17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 22ab9cd1cSSteven Whitehouse /* 32ab9cd1cSSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4f2741d98SSteven Whitehouse * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 52ab9cd1cSSteven Whitehouse */ 62ab9cd1cSSteven Whitehouse 72ab9cd1cSSteven Whitehouse #include <linux/slab.h> 82ab9cd1cSSteven Whitehouse #include <linux/spinlock.h> 92ab9cd1cSSteven Whitehouse #include <linux/completion.h> 102ab9cd1cSSteven Whitehouse #include <linux/buffer_head.h> 112ab9cd1cSSteven Whitehouse #include <linux/namei.h> 122ab9cd1cSSteven Whitehouse #include <linux/mm.h> 135b825c3aSIngo Molnar #include <linux/cred.h> 142ab9cd1cSSteven Whitehouse #include <linux/xattr.h> 152ab9cd1cSSteven Whitehouse #include <linux/posix_acl.h> 162ab9cd1cSSteven Whitehouse #include <linux/gfs2_ondisk.h> 172ab9cd1cSSteven Whitehouse #include <linux/crc32.h> 18aac1a55bSBob Peterson #include <linux/iomap.h> 192ab9cd1cSSteven Whitehouse #include <linux/security.h> 2010c5db28SChristoph Hellwig #include <linux/fiemap.h> 217c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 222ab9cd1cSSteven Whitehouse 232ab9cd1cSSteven Whitehouse #include "gfs2.h" 242ab9cd1cSSteven Whitehouse #include "incore.h" 252ab9cd1cSSteven Whitehouse #include "acl.h" 262ab9cd1cSSteven Whitehouse #include "bmap.h" 272ab9cd1cSSteven Whitehouse #include "dir.h" 282ab9cd1cSSteven Whitehouse #include "xattr.h" 292ab9cd1cSSteven Whitehouse #include "glock.h" 302ab9cd1cSSteven Whitehouse #include "inode.h" 312ab9cd1cSSteven Whitehouse #include "meta_io.h" 322ab9cd1cSSteven Whitehouse #include "quota.h" 332ab9cd1cSSteven Whitehouse #include "rgrp.h" 342ab9cd1cSSteven Whitehouse #include "trans.h" 352ab9cd1cSSteven Whitehouse #include "util.h" 362ab9cd1cSSteven Whitehouse #include "super.h" 372ab9cd1cSSteven Whitehouse #include "glops.h" 382ab9cd1cSSteven Whitehouse 39e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops; 40e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops; 41e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops; 42e3a77eebSAndreas Gruenbacher 432ab9cd1cSSteven Whitehouse /** 442ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 452ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 462ab9cd1cSSteven Whitehouse * 472ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 482ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 492ab9cd1cSSteven Whitehouse */ 502ab9cd1cSSteven Whitehouse 512ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 522ab9cd1cSSteven Whitehouse { 532ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 542ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 552ab9cd1cSSteven Whitehouse 562ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 572ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 582ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 592ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 602ab9cd1cSSteven Whitehouse else 612ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 622ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 632ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 642ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 652ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 662ab9cd1cSSteven Whitehouse else 672ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 682ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 692ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 702ab9cd1cSSteven Whitehouse } else { 712ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 722ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 732ab9cd1cSSteven Whitehouse } 742ab9cd1cSSteven Whitehouse } 752ab9cd1cSSteven Whitehouse 765f6e13baSAndreas Gruenbacher static int iget_test(struct inode *inode, void *opaque) 775f6e13baSAndreas Gruenbacher { 785f6e13baSAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 795f6e13baSAndreas Gruenbacher 805f6e13baSAndreas Gruenbacher return GFS2_I(inode)->i_no_addr == no_addr; 815f6e13baSAndreas Gruenbacher } 825f6e13baSAndreas Gruenbacher 835f6e13baSAndreas Gruenbacher static int iget_set(struct inode *inode, void *opaque) 845f6e13baSAndreas Gruenbacher { 855f6e13baSAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 865f6e13baSAndreas Gruenbacher 875f6e13baSAndreas Gruenbacher GFS2_I(inode)->i_no_addr = no_addr; 885f6e13baSAndreas Gruenbacher inode->i_ino = no_addr; 895f6e13baSAndreas Gruenbacher return 0; 905f6e13baSAndreas Gruenbacher } 915f6e13baSAndreas Gruenbacher 922ab9cd1cSSteven Whitehouse /** 932ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 942ab9cd1cSSteven Whitehouse * @sb: The super block 952ab9cd1cSSteven Whitehouse * @type: The type of the inode 963ce37b2cSAndreas Gruenbacher * @no_addr: The inode number 973ce37b2cSAndreas Gruenbacher * @no_formal_ino: The inode generation number 983ce37b2cSAndreas Gruenbacher * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 9961b91cfdSAndreas Gruenbacher * GFS2_BLKST_FREE to indicate not to verify) 1003ce37b2cSAndreas Gruenbacher * 1013ce37b2cSAndreas Gruenbacher * If @type is DT_UNKNOWN, the inode type is fetched from disk. 1023ce37b2cSAndreas Gruenbacher * 1033ce37b2cSAndreas Gruenbacher * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 1043ce37b2cSAndreas Gruenbacher * placeholder because it doesn't otherwise make sense), the on-disk block type 1053ce37b2cSAndreas Gruenbacher * is verified to be @blktype. 1062ab9cd1cSSteven Whitehouse * 107b66648adSAndreas Gruenbacher * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE) 108b66648adSAndreas Gruenbacher * if it detects that @no_formal_ino doesn't match the actual inode generation 109b66648adSAndreas Gruenbacher * number. However, it doesn't always know unless @type is DT_UNKNOWN. 110b66648adSAndreas Gruenbacher * 1112ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1122ab9cd1cSSteven Whitehouse */ 1132ab9cd1cSSteven Whitehouse 1142ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1153ce37b2cSAndreas Gruenbacher u64 no_addr, u64 no_formal_ino, 1163ce37b2cSAndreas Gruenbacher unsigned int blktype) 1172ab9cd1cSSteven Whitehouse { 1182ab9cd1cSSteven Whitehouse struct inode *inode; 1192ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1203ce37b2cSAndreas Gruenbacher struct gfs2_holder i_gh; 1212ab9cd1cSSteven Whitehouse int error; 1222ab9cd1cSSteven Whitehouse 1236df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 1245f6e13baSAndreas Gruenbacher inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 1252ab9cd1cSSteven Whitehouse if (!inode) 126ac3beb6aSSteven Whitehouse return ERR_PTR(-ENOMEM); 1272ab9cd1cSSteven Whitehouse 128e97321faSBob Peterson ip = GFS2_I(inode); 129e97321faSBob Peterson 1302ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1312ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1325f6e13baSAndreas Gruenbacher struct gfs2_glock *io_gl; 133c412a97cSBob Peterson int extra_flags = 0; 1342ab9cd1cSSteven Whitehouse 13529464ee3SAndreas Gruenbacher error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, 13629464ee3SAndreas Gruenbacher &ip->i_gl); 13729464ee3SAndreas Gruenbacher if (unlikely(error)) 13829464ee3SAndreas Gruenbacher goto fail; 13929464ee3SAndreas Gruenbacher 14029464ee3SAndreas Gruenbacher error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, 14129464ee3SAndreas Gruenbacher &io_gl); 14229464ee3SAndreas Gruenbacher if (unlikely(error)) 14329464ee3SAndreas Gruenbacher goto fail; 14429464ee3SAndreas Gruenbacher 1452ec750a0SAndreas Gruenbacher /* 1462ec750a0SAndreas Gruenbacher * The only caller that sets @blktype to GFS2_BLKST_UNLINKED is 1472ec750a0SAndreas Gruenbacher * delete_work_func(). Make sure not to cancel the delete work 1482ec750a0SAndreas Gruenbacher * from within itself here. 1492ec750a0SAndreas Gruenbacher */ 150c412a97cSBob Peterson if (blktype == GFS2_BLKST_UNLINKED) 151c412a97cSBob Peterson extra_flags |= LM_FLAG_TRY; 152c412a97cSBob Peterson else 15329464ee3SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 154c412a97cSBob Peterson error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, 155c7d7d2d3SAndreas Gruenbacher GL_EXACT | GL_NOPID | extra_flags, 15629464ee3SAndreas Gruenbacher &ip->i_iopen_gh); 15729464ee3SAndreas Gruenbacher gfs2_glock_put(io_gl); 1582ab9cd1cSSteven Whitehouse if (unlikely(error)) 1592ab9cd1cSSteven Whitehouse goto fail; 1602ab9cd1cSSteven Whitehouse 1613ce37b2cSAndreas Gruenbacher if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 1623ce37b2cSAndreas Gruenbacher /* 1633ce37b2cSAndreas Gruenbacher * The GL_SKIP flag indicates to skip reading the inode 1645f6e13baSAndreas Gruenbacher * block. We read the inode when instantiating it 1653ce37b2cSAndreas Gruenbacher * after possibly checking the block type. 1663ce37b2cSAndreas Gruenbacher */ 1673ce37b2cSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 1683ce37b2cSAndreas Gruenbacher GL_SKIP, &i_gh); 1693ce37b2cSAndreas Gruenbacher if (error) 17040e7e86eSAndreas Gruenbacher goto fail; 1713ce37b2cSAndreas Gruenbacher 172b66648adSAndreas Gruenbacher error = -ESTALE; 173b66648adSAndreas Gruenbacher if (no_formal_ino && 174b66648adSAndreas Gruenbacher gfs2_inode_already_deleted(ip->i_gl, no_formal_ino)) 175b66648adSAndreas Gruenbacher goto fail; 176b66648adSAndreas Gruenbacher 1773ce37b2cSAndreas Gruenbacher if (blktype != GFS2_BLKST_FREE) { 1783ce37b2cSAndreas Gruenbacher error = gfs2_check_blk_type(sdp, no_addr, 1793ce37b2cSAndreas Gruenbacher blktype); 1803ce37b2cSAndreas Gruenbacher if (error) 18140e7e86eSAndreas Gruenbacher goto fail; 1823ce37b2cSAndreas Gruenbacher } 1833ce37b2cSAndreas Gruenbacher } 1843ce37b2cSAndreas Gruenbacher 185f2e70d8fSBob Peterson set_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags); 1865f6e13baSAndreas Gruenbacher 1872b0fb353SAndreas Gruenbacher /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 1882b0fb353SAndreas Gruenbacher inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 1892b0fb353SAndreas Gruenbacher inode->i_atime.tv_nsec = 0; 1902b0fb353SAndreas Gruenbacher 1915f6e13baSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 1925f6e13baSAndreas Gruenbacher 1932ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1942ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 195f2e70d8fSBob Peterson error = gfs2_instantiate(&i_gh); 1965f6e13baSAndreas Gruenbacher if (error) { 1975f6e13baSAndreas Gruenbacher glock_clear_object(ip->i_gl, ip); 19840e7e86eSAndreas Gruenbacher goto fail; 1995f6e13baSAndreas Gruenbacher } 2002ab9cd1cSSteven Whitehouse } else { 2012b0fb353SAndreas Gruenbacher ip->i_no_formal_ino = no_formal_ino; 2022ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 2032ab9cd1cSSteven Whitehouse } 2042ab9cd1cSSteven Whitehouse 2056df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2063ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 2075f6e13baSAndreas Gruenbacher glock_set_object(ip->i_iopen_gh.gh_gl, ip); 208b66648adSAndreas Gruenbacher 209b66648adSAndreas Gruenbacher gfs2_set_iop(inode); 210b8e12e35SAndreas Gruenbacher unlock_new_inode(inode); 211b66648adSAndreas Gruenbacher } 212b66648adSAndreas Gruenbacher 213b66648adSAndreas Gruenbacher if (no_formal_ino && ip->i_no_formal_ino && 214b66648adSAndreas Gruenbacher no_formal_ino != ip->i_no_formal_ino) { 215b66648adSAndreas Gruenbacher iput(inode); 216b8e12e35SAndreas Gruenbacher return ERR_PTR(-ESTALE); 217b66648adSAndreas Gruenbacher } 218b66648adSAndreas Gruenbacher 2192ab9cd1cSSteven Whitehouse return inode; 2202ab9cd1cSSteven Whitehouse 22140e7e86eSAndreas Gruenbacher fail: 222c412a97cSBob Peterson if (error == GLR_TRYFAILED) 223c412a97cSBob Peterson error = -EAGAIN; 2245f6e13baSAndreas Gruenbacher if (gfs2_holder_initialized(&ip->i_iopen_gh)) 225763766c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 2266df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2273ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 2289ffa1888SAndreas Gruenbacher if (ip->i_gl) { 2299ffa1888SAndreas Gruenbacher gfs2_glock_put(ip->i_gl); 2309ffa1888SAndreas Gruenbacher ip->i_gl = NULL; 2319ffa1888SAndreas Gruenbacher } 2322ab9cd1cSSteven Whitehouse iget_failed(inode); 2332ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2342ab9cd1cSSteven Whitehouse } 2352ab9cd1cSSteven Whitehouse 2366bdcadeaSAndreas Gruenbacher /** 2376bdcadeaSAndreas Gruenbacher * gfs2_lookup_by_inum - look up an inode by inode number 2386bdcadeaSAndreas Gruenbacher * @sdp: The super block 2396bdcadeaSAndreas Gruenbacher * @no_addr: The inode number 2406bdcadeaSAndreas Gruenbacher * @no_formal_ino: The inode generation number (0 for any) 2416bdcadeaSAndreas Gruenbacher * @blktype: Requested block type (see gfs2_inode_lookup) 2426bdcadeaSAndreas Gruenbacher */ 2432ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2446bdcadeaSAndreas Gruenbacher u64 no_formal_ino, unsigned int blktype) 2452ab9cd1cSSteven Whitehouse { 2462ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2473ce37b2cSAndreas Gruenbacher struct inode *inode; 2482ab9cd1cSSteven Whitehouse int error; 2492ab9cd1cSSteven Whitehouse 250b66648adSAndreas Gruenbacher inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, 251b66648adSAndreas Gruenbacher blktype); 2522ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2533ce37b2cSAndreas Gruenbacher return inode; 2542ab9cd1cSSteven Whitehouse 2552ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2562ab9cd1cSSteven Whitehouse error = -EIO; 2572ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2582ab9cd1cSSteven Whitehouse goto fail_iput; 2592ab9cd1cSSteven Whitehouse } 2603ce37b2cSAndreas Gruenbacher return inode; 2612ab9cd1cSSteven Whitehouse 2622ab9cd1cSSteven Whitehouse fail_iput: 2632ab9cd1cSSteven Whitehouse iput(inode); 2643ce37b2cSAndreas Gruenbacher return ERR_PTR(error); 2652ab9cd1cSSteven Whitehouse } 2662ab9cd1cSSteven Whitehouse 2672ab9cd1cSSteven Whitehouse 268*0db3b4e5SAndreas Gruenbacher /** 269*0db3b4e5SAndreas Gruenbacher * gfs2_lookup_meta - Look up an inode in a metadata directory 270*0db3b4e5SAndreas Gruenbacher * @dip: The directory 271*0db3b4e5SAndreas Gruenbacher * @name: The name of the inode 272*0db3b4e5SAndreas Gruenbacher */ 273*0db3b4e5SAndreas Gruenbacher struct inode *gfs2_lookup_meta(struct inode *dip, const char *name) 2742ab9cd1cSSteven Whitehouse { 2752ab9cd1cSSteven Whitehouse struct qstr qstr; 2762ab9cd1cSSteven Whitehouse struct inode *inode; 277*0db3b4e5SAndreas Gruenbacher 2782ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2792ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 280111c7d27SAndreas Gruenbacher if (IS_ERR_OR_NULL(inode)) 281111c7d27SAndreas Gruenbacher return inode ? inode : ERR_PTR(-ENOENT); 282111c7d27SAndreas Gruenbacher 283111c7d27SAndreas Gruenbacher /* 284111c7d27SAndreas Gruenbacher * Must not call back into the filesystem when allocating 285111c7d27SAndreas Gruenbacher * pages in the metadata inode's address space. 286111c7d27SAndreas Gruenbacher */ 287111c7d27SAndreas Gruenbacher mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); 288111c7d27SAndreas Gruenbacher 2892ab9cd1cSSteven Whitehouse return inode; 2902ab9cd1cSSteven Whitehouse } 2912ab9cd1cSSteven Whitehouse 2922ab9cd1cSSteven Whitehouse 2932ab9cd1cSSteven Whitehouse /** 2942ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 295c551f66cSLee Jones * @dir: The inode of the directory containing the inode to look-up 2962ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2972ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2982ab9cd1cSSteven Whitehouse * 2992ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 3002ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 3012ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 3022ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 3032ab9cd1cSSteven Whitehouse * 3042ab9cd1cSSteven Whitehouse * Returns: errno 3052ab9cd1cSSteven Whitehouse */ 3062ab9cd1cSSteven Whitehouse 3072ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 3082ab9cd1cSSteven Whitehouse int is_root) 3092ab9cd1cSSteven Whitehouse { 3102ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 3112ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 3122ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 3132ab9cd1cSSteven Whitehouse int error = 0; 3142ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 3152ab9cd1cSSteven Whitehouse 3166df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&d_gh); 3172ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 3182ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 3192ab9cd1cSSteven Whitehouse 3202ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 3212ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 3222b0143b5SDavid Howells dir == d_inode(sb->s_root))) { 3232ab9cd1cSSteven Whitehouse igrab(dir); 3242ab9cd1cSSteven Whitehouse return dir; 3252ab9cd1cSSteven Whitehouse } 3262ab9cd1cSSteven Whitehouse 3272ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3282ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3292ab9cd1cSSteven Whitehouse if (error) 3302ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3312ab9cd1cSSteven Whitehouse } 3322ab9cd1cSSteven Whitehouse 3332ab9cd1cSSteven Whitehouse if (!is_root) { 3344609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, dir, MAY_EXEC); 3352ab9cd1cSSteven Whitehouse if (error) 3362ab9cd1cSSteven Whitehouse goto out; 3372ab9cd1cSSteven Whitehouse } 3382ab9cd1cSSteven Whitehouse 3395a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3402ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3412ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3422ab9cd1cSSteven Whitehouse out: 3436df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&d_gh)) 3442ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3452ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3462ab9cd1cSSteven Whitehouse return NULL; 3472ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3482ab9cd1cSSteven Whitehouse } 3492ab9cd1cSSteven Whitehouse 3502ab9cd1cSSteven Whitehouse /** 3512ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3522ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3532ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3542ab9cd1cSSteven Whitehouse * @mode: 3552ab9cd1cSSteven Whitehouse * 3562ab9cd1cSSteven Whitehouse * Returns: errno 3572ab9cd1cSSteven Whitehouse */ 3582ab9cd1cSSteven Whitehouse 3592ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 360175a4eb7SAl Viro umode_t mode) 3612ab9cd1cSSteven Whitehouse { 3622ab9cd1cSSteven Whitehouse int error; 3632ab9cd1cSSteven Whitehouse 3644609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode, 365549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 3662ab9cd1cSSteven Whitehouse if (error) 3672ab9cd1cSSteven Whitehouse return error; 3682ab9cd1cSSteven Whitehouse 3692ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3702ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3712ab9cd1cSSteven Whitehouse return -ENOENT; 3722ab9cd1cSSteven Whitehouse 3732ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3742ab9cd1cSSteven Whitehouse return -EFBIG; 3752ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3762ab9cd1cSSteven Whitehouse return -EMLINK; 3772ab9cd1cSSteven Whitehouse 3782ab9cd1cSSteven Whitehouse return 0; 3792ab9cd1cSSteven Whitehouse } 3802ab9cd1cSSteven Whitehouse 381c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 382c9aecf73SSteven Whitehouse struct inode *inode) 3832ab9cd1cSSteven Whitehouse { 3842ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3856b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3866b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 387c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 388c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3896b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 390c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 391c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3922ab9cd1cSSteven Whitehouse } else 393c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3942ab9cd1cSSteven Whitehouse 3952ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 396c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 397c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 398c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3992ab9cd1cSSteven Whitehouse } else 400c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 4012ab9cd1cSSteven Whitehouse } 4022ab9cd1cSSteven Whitehouse 403b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 4042ab9cd1cSSteven Whitehouse { 405c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 406b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 4072ab9cd1cSSteven Whitehouse int error; 4082ab9cd1cSSteven Whitehouse 409b8fbf471SAbhi Das error = gfs2_quota_lock_check(ip, &ap); 4102ab9cd1cSSteven Whitehouse if (error) 4112ab9cd1cSSteven Whitehouse goto out; 4122ab9cd1cSSteven Whitehouse 4137b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 414fd4b4e04SSteven Whitehouse if (error) 415fd4b4e04SSteven Whitehouse goto out_quota; 416fd4b4e04SSteven Whitehouse 417b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 4182ab9cd1cSSteven Whitehouse if (error) 4192ab9cd1cSSteven Whitehouse goto out_ipreserv; 4202ab9cd1cSSteven Whitehouse 421d92445b2SAndreas Gruenbacher error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1); 42235c23fbaSAndreas Gruenbacher if (error) 42335c23fbaSAndreas Gruenbacher goto out_trans_end; 42435c23fbaSAndreas Gruenbacher 425c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 426c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 427c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 42838552ff6SAndreas Gruenbacher if (*dblocks > 1) 42938552ff6SAndreas Gruenbacher ip->i_eattr = ip->i_no_addr + 1; 4302ab9cd1cSSteven Whitehouse 43135c23fbaSAndreas Gruenbacher out_trans_end: 4322ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4332ab9cd1cSSteven Whitehouse out_ipreserv: 434c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 435fd4b4e04SSteven Whitehouse out_quota: 436fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4372ab9cd1cSSteven Whitehouse out: 4382ab9cd1cSSteven Whitehouse return error; 4392ab9cd1cSSteven Whitehouse } 4402ab9cd1cSSteven Whitehouse 441f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 442f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 443e2d0a13bSSteven Whitehouse { 444e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 445e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 446e2d0a13bSSteven Whitehouse 447e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 448e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 449e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 450e2d0a13bSSteven Whitehouse 451e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 452e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 453e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 454e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 455e2d0a13bSSteven Whitehouse 456e2d0a13bSSteven Whitehouse } 457e2d0a13bSSteven Whitehouse 4582ab9cd1cSSteven Whitehouse /** 459b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 460b2c8b3eaSSteven Whitehouse * @ip: The inode in question 461b2c8b3eaSSteven Whitehouse * 462b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 463b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 464b2c8b3eaSSteven Whitehouse */ 465b2c8b3eaSSteven Whitehouse 466b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 467b2c8b3eaSSteven Whitehouse { 468b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 469b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 470b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 471b2c8b3eaSSteven Whitehouse 472b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 473b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 474b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 475b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 476b2c8b3eaSSteven Whitehouse 477b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 478b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 479b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 480b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 481b2c8b3eaSSteven Whitehouse 482b2c8b3eaSSteven Whitehouse brelse(bh); 483b2c8b3eaSSteven Whitehouse } 484b2c8b3eaSSteven Whitehouse 485b2c8b3eaSSteven Whitehouse /** 4862ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 487f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 488c9aecf73SSteven Whitehouse * @ip: The inode 489f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 4902ab9cd1cSSteven Whitehouse * 4912ab9cd1cSSteven Whitehouse */ 4922ab9cd1cSSteven Whitehouse 493c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 49479ba7480SSteven Whitehouse const char *symname) 4952ab9cd1cSSteven Whitehouse { 4962ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4972ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4982ab9cd1cSSteven Whitehouse 499c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 500350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 5012ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 50279ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 5032ab9cd1cSSteven Whitehouse 5046f24784fSAl Viro di->di_major = cpu_to_be32(imajor(&ip->i_inode)); 5056f24784fSAl Viro di->di_minor = cpu_to_be32(iminor(&ip->i_inode)); 5062ab9cd1cSSteven Whitehouse di->__pad1 = 0; 5072ab9cd1cSSteven Whitehouse di->__pad2 = 0; 5082ab9cd1cSSteven Whitehouse di->__pad3 = 0; 5092ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 5102ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 51179ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 5122ab9cd1cSSteven Whitehouse 513c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 514160b4026SSteven Whitehouse case S_IFDIR: 515e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 516160b4026SSteven Whitehouse break; 517160b4026SSteven Whitehouse case S_IFLNK: 518c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 519160b4026SSteven Whitehouse break; 520e2d0a13bSSteven Whitehouse } 521e2d0a13bSSteven Whitehouse 5222ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 52379ba7480SSteven Whitehouse brelse(dibh); 5242ab9cd1cSSteven Whitehouse } 5252ab9cd1cSSteven Whitehouse 526534cf9caSSteven Whitehouse /** 527c551f66cSLee Jones * gfs2_trans_da_blks - Calculate number of blocks to link inode 528534cf9caSSteven Whitehouse * @dip: The directory we are linking into 529534cf9caSSteven Whitehouse * @da: The dir add information 530534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 531534cf9caSSteven Whitehouse * 532534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 533534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 534534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 535534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 536534cf9caSSteven Whitehouse * 537534cf9caSSteven Whitehouse * Returns: Number of blocks 538534cf9caSSteven Whitehouse */ 539534cf9caSSteven Whitehouse 540534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 541534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 542534cf9caSSteven Whitehouse unsigned nr_inodes) 543534cf9caSSteven Whitehouse { 544534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 545534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 546534cf9caSSteven Whitehouse } 547534cf9caSSteven Whitehouse 5482ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5493c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5502ab9cd1cSSteven Whitehouse { 5512ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5523c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5532ab9cd1cSSteven Whitehouse int error; 5542ab9cd1cSSteven Whitehouse 5553c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 556b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 5572ab9cd1cSSteven Whitehouse if (error) 5582ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5592ab9cd1cSSteven Whitehouse 5607b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5612ab9cd1cSSteven Whitehouse if (error) 5622ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5632ab9cd1cSSteven Whitehouse 564534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5652ab9cd1cSSteven Whitehouse if (error) 5662ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5672ab9cd1cSSteven Whitehouse } else { 5682ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5692ab9cd1cSSteven Whitehouse if (error) 5702ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5712ab9cd1cSSteven Whitehouse } 5722ab9cd1cSSteven Whitehouse 5732b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5742ab9cd1cSSteven Whitehouse 5752ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5762ab9cd1cSSteven Whitehouse fail_ipreserv: 5772ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5782ab9cd1cSSteven Whitehouse fail_quota_locks: 5792ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5802ab9cd1cSSteven Whitehouse return error; 5812ab9cd1cSSteven Whitehouse } 5822ab9cd1cSSteven Whitehouse 58346cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5849d8f13baSMimi Zohar void *fs_info) 5852ab9cd1cSSteven Whitehouse { 5869d8f13baSMimi Zohar const struct xattr *xattr; 5879d8f13baSMimi Zohar int err = 0; 5882ab9cd1cSSteven Whitehouse 5899d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5909d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5919d8f13baSMimi Zohar xattr->value_len, 0, 5929d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5939d8f13baSMimi Zohar if (err < 0) 5949d8f13baSMimi Zohar break; 5959d8f13baSMimi Zohar } 5962ab9cd1cSSteven Whitehouse return err; 5972ab9cd1cSSteven Whitehouse } 5982ab9cd1cSSteven Whitehouse 5992ab9cd1cSSteven Whitehouse /** 600f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 601f2741d98SSteven Whitehouse * @dir: The parent directory 602f2741d98SSteven Whitehouse * @dentry: The new dentry 6036d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 604f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 605f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 606f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 607f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 608c551f66cSLee Jones * @excl: Force fail if inode exists 6092ab9cd1cSSteven Whitehouse * 61038552ff6SAndreas Gruenbacher * FIXME: Change to allocate the disk blocks and write them out in the same 61138552ff6SAndreas Gruenbacher * transaction. That way, we can no longer end up in a situation in which an 61238552ff6SAndreas Gruenbacher * inode is allocated, the node crashes, and the block looks like a valid 61338552ff6SAndreas Gruenbacher * inode. (With atomic creates in place, we will also no longer need to zero 61438552ff6SAndreas Gruenbacher * the link count and dirty the inode here on failure.) 61538552ff6SAndreas Gruenbacher * 616f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 6172ab9cd1cSSteven Whitehouse */ 6182ab9cd1cSSteven Whitehouse 619f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 6206d4ade98SSteven Whitehouse struct file *file, 621175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 622b452a458SAl Viro unsigned int size, int excl) 6232ab9cd1cSSteven Whitehouse { 624f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 625e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 626761fdbbcSAndreas Gruenbacher struct gfs2_holder d_gh, gh; 6272ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 6288e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 6292ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 630a55a47a3SAndreas Gruenbacher struct gfs2_glock *io_gl; 63138552ff6SAndreas Gruenbacher int error; 6329dbe9610SSteven Whitehouse u32 aflags = 0; 633b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 63419aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 6352ab9cd1cSSteven Whitehouse 6362ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 637f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6382ab9cd1cSSteven Whitehouse 6392fba46a0SBob Peterson error = gfs2_qa_get(dip); 6400a305e49SBob Peterson if (error) 6410a305e49SBob Peterson return error; 6420a305e49SBob Peterson 643fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 644fd4b4e04SSteven Whitehouse if (error) 6452fba46a0SBob Peterson goto fail; 646fd4b4e04SSteven Whitehouse 647761fdbbcSAndreas Gruenbacher error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); 6482ab9cd1cSSteven Whitehouse if (error) 6492ab9cd1cSSteven Whitehouse goto fail; 650761fdbbcSAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 6512ab9cd1cSSteven Whitehouse 6522ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6532ab9cd1cSSteven Whitehouse if (error) 6542ab9cd1cSSteven Whitehouse goto fail_gunlock; 6552ab9cd1cSSteven Whitehouse 6565a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6575a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6585a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 659571a4b57SAl Viro if (S_ISDIR(inode->i_mode)) { 660571a4b57SAl Viro iput(inode); 661571a4b57SAl Viro inode = ERR_PTR(-EISDIR); 662571a4b57SAl Viro goto fail_gunlock; 663571a4b57SAl Viro } 66444bb31baSAl Viro d_instantiate(dentry, inode); 6656d4ade98SSteven Whitehouse error = 0; 6660d0d1107SMiklos Szeredi if (file) { 66744bb31baSAl Viro if (S_ISREG(inode->i_mode)) 668be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 66944bb31baSAl Viro else 67044bb31baSAl Viro error = finish_no_open(file, NULL); 6715ca1db41SMiklos Szeredi } 672761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 6732297ab61SBob Peterson goto fail; 6745a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6755a00f3ccSSteven Whitehouse goto fail_gunlock; 6765a00f3ccSSteven Whitehouse } 6775a00f3ccSSteven Whitehouse 6783c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 679fd4b4e04SSteven Whitehouse if (error < 0) 680fd4b4e04SSteven Whitehouse goto fail_gunlock; 681fd4b4e04SSteven Whitehouse 682c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 683fd4b4e04SSteven Whitehouse error = -ENOMEM; 684fd4b4e04SSteven Whitehouse if (!inode) 685fd4b4e04SSteven Whitehouse goto fail_gunlock; 6863d0258bcSAndreas Gruenbacher ip = GFS2_I(inode); 687fd4b4e04SSteven Whitehouse 688e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 689e01580bfSChristoph Hellwig if (error) 690783013c0SBob Peterson goto fail_gunlock; 691e01580bfSChristoph Hellwig 6922fba46a0SBob Peterson error = gfs2_qa_get(ip); 693ff7f4cb4SSteven Whitehouse if (error) 694e01580bfSChristoph Hellwig goto fail_free_acls; 695c9aecf73SSteven Whitehouse 696c9aecf73SSteven Whitehouse inode->i_mode = mode; 69779ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 698c9aecf73SSteven Whitehouse inode->i_rdev = dev; 699c9aecf73SSteven Whitehouse inode->i_size = size; 7008a8b8d91SJeff Layton inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode); 701c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 70200a158beSAbhi Das check_and_update_goal(dip); 703c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 70428fb3027SSteven Whitehouse ip->i_diskflags = 0; 70528fb3027SSteven Whitehouse ip->i_eattr = 0; 70628fb3027SSteven Whitehouse ip->i_height = 0; 70728fb3027SSteven Whitehouse ip->i_depth = 0; 70828fb3027SSteven Whitehouse ip->i_entries = 0; 709cc963a11SBob Peterson ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 71028fb3027SSteven Whitehouse 71128fb3027SSteven Whitehouse switch(mode & S_IFMT) { 71228fb3027SSteven Whitehouse case S_IFREG: 71328fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 71428fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 71528fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 71628fb3027SSteven Whitehouse gfs2_set_aops(inode); 71728fb3027SSteven Whitehouse break; 71828fb3027SSteven Whitehouse case S_IFDIR: 71928fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 72028fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 72128fb3027SSteven Whitehouse ip->i_entries = 2; 72228fb3027SSteven Whitehouse break; 72328fb3027SSteven Whitehouse } 724acc546fdSAbhi Das 725acc546fdSAbhi Das /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 726acc546fdSAbhi Das if (dip->i_diskflags & GFS2_DIF_SYSTEM) 727acc546fdSAbhi Das ip->i_diskflags |= GFS2_DIF_SYSTEM; 728acc546fdSAbhi Das 72928fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 730c9aecf73SSteven Whitehouse 7312b0143b5SDavid Howells if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 7329dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7339dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7349dbe9610SSteven Whitehouse 735b2c8b3eaSSteven Whitehouse if (default_acl || acl) 736b2c8b3eaSSteven Whitehouse blocks++; 737b2c8b3eaSSteven Whitehouse 738b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 739c9aecf73SSteven Whitehouse if (error) 740c9aecf73SSteven Whitehouse goto fail_free_inode; 741c9aecf73SSteven Whitehouse 742b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 743b2c8b3eaSSteven Whitehouse 744c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 745c9aecf73SSteven Whitehouse if (error) 746c9aecf73SSteven Whitehouse goto fail_free_inode; 74798e5a91aSAndreas Gruenbacher 748dd0ecf54SAndreas Gruenbacher error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 749c9aecf73SSteven Whitehouse if (error) 750c9aecf73SSteven Whitehouse goto fail_free_inode; 751dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 752dd0ecf54SAndreas Gruenbacher 7534ec3c19dSAndreas Gruenbacher retry: 7543d36e57fSAndreas Gruenbacher error = insert_inode_locked4(inode, ip->i_no_addr, iget_test, &ip->i_no_addr); 7554ec3c19dSAndreas Gruenbacher if (error == -EBUSY) 7564ec3c19dSAndreas Gruenbacher goto retry; 7574ec3c19dSAndreas Gruenbacher if (error) 7584ec3c19dSAndreas Gruenbacher goto fail_gunlock2; 7593d36e57fSAndreas Gruenbacher 760ebdc416cSAndreas Gruenbacher error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT | GL_NOPID, 761ebdc416cSAndreas Gruenbacher &ip->i_iopen_gh); 762dd0ecf54SAndreas Gruenbacher if (error) 763dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 764c9aecf73SSteven Whitehouse 765761fdbbcSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); 76629464ee3SAndreas Gruenbacher if (error) 76729464ee3SAndreas Gruenbacher goto fail_gunlock3; 76829464ee3SAndreas Gruenbacher 769b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 770c9aecf73SSteven Whitehouse if (error) 77129464ee3SAndreas Gruenbacher goto fail_gunlock3; 7720a305e49SBob Peterson 77338552ff6SAndreas Gruenbacher if (blocks > 1) 774b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 77579ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 776fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 777fd4b4e04SSteven Whitehouse 7783d36e57fSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 7798793e149SBob Peterson glock_set_object(io_gl, ip); 780c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 781c9aecf73SSteven Whitehouse 782e01580bfSChristoph Hellwig if (default_acl) { 7831a39ba99SAl Viro error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 7842ab9cd1cSSteven Whitehouse if (error) 78529464ee3SAndreas Gruenbacher goto fail_gunlock4; 7866ff9b09eSAndreas Gruenbacher posix_acl_release(default_acl); 7876ff9b09eSAndreas Gruenbacher default_acl = NULL; 7886ff9b09eSAndreas Gruenbacher } 7896ff9b09eSAndreas Gruenbacher if (acl) { 7906ff9b09eSAndreas Gruenbacher error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 7916ff9b09eSAndreas Gruenbacher if (error) 79229464ee3SAndreas Gruenbacher goto fail_gunlock4; 7936ff9b09eSAndreas Gruenbacher posix_acl_release(acl); 7946ff9b09eSAndreas Gruenbacher acl = NULL; 7956ff9b09eSAndreas Gruenbacher } 7962ab9cd1cSSteven Whitehouse 797f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 798f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7992ab9cd1cSSteven Whitehouse if (error) 80029464ee3SAndreas Gruenbacher goto fail_gunlock4; 8012ab9cd1cSSteven Whitehouse 8023c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 8032ab9cd1cSSteven Whitehouse if (error) 80429464ee3SAndreas Gruenbacher goto fail_gunlock4; 8052ab9cd1cSSteven Whitehouse 80679ba7480SSteven Whitehouse mark_inode_dirty(inode); 8076d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 8082c47c1beSBob Peterson /* After instantiate, errors should result in evict which will destroy 8092c47c1beSBob Peterson * both inode and iopen glocks properly. */ 810c5bf8fefSMiklos Szeredi if (file) { 81173a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 812be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 813c5bf8fefSMiklos Szeredi } 814761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 8152297ab61SBob Peterson gfs2_qa_put(ip); 816761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 8172c47c1beSBob Peterson gfs2_glock_put(io_gl); 8182297ab61SBob Peterson gfs2_qa_put(dip); 8193d36e57fSAndreas Gruenbacher unlock_new_inode(inode); 8206d4ade98SSteven Whitehouse return error; 8212ab9cd1cSSteven Whitehouse 82229464ee3SAndreas Gruenbacher fail_gunlock4: 8233d36e57fSAndreas Gruenbacher glock_clear_object(ip->i_gl, ip); 8249c1b2808SBob Peterson glock_clear_object(io_gl, ip); 82529464ee3SAndreas Gruenbacher fail_gunlock3: 826783013c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 8272ab9cd1cSSteven Whitehouse fail_gunlock2: 8282c47c1beSBob Peterson gfs2_glock_put(io_gl); 829c9aecf73SSteven Whitehouse fail_free_inode: 8309ffa1888SAndreas Gruenbacher if (ip->i_gl) { 8319ffa1888SAndreas Gruenbacher gfs2_glock_put(ip->i_gl); 8329ffa1888SAndreas Gruenbacher ip->i_gl = NULL; 8339ffa1888SAndreas Gruenbacher } 8347336905aSAndreas Gruenbacher gfs2_rs_deltree(&ip->i_res); 8351595548fSAndreas Gruenbacher gfs2_qa_put(ip); 836e01580bfSChristoph Hellwig fail_free_acls: 837e01580bfSChristoph Hellwig posix_acl_release(default_acl); 838e01580bfSChristoph Hellwig posix_acl_release(acl); 8392ab9cd1cSSteven Whitehouse fail_gunlock: 8402b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 841761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 84215a798f7SKefeng Wang if (!IS_ERR_OR_NULL(inode)) { 84338552ff6SAndreas Gruenbacher set_bit(GIF_ALLOC_FAILED, &ip->i_flags); 84479ba7480SSteven Whitehouse clear_nlink(inode); 84538552ff6SAndreas Gruenbacher if (ip->i_no_addr) 84679ba7480SSteven Whitehouse mark_inode_dirty(inode); 8473d36e57fSAndreas Gruenbacher if (inode->i_state & I_NEW) 8483d36e57fSAndreas Gruenbacher iget_failed(inode); 8493d36e57fSAndreas Gruenbacher else 85040ac218fSSteven Whitehouse iput(inode); 85140ac218fSSteven Whitehouse } 852761fdbbcSAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 853761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 8542ab9cd1cSSteven Whitehouse fail: 8552fba46a0SBob Peterson gfs2_qa_put(dip); 856f2741d98SSteven Whitehouse return error; 8572ab9cd1cSSteven Whitehouse } 858f2741d98SSteven Whitehouse 8592ab9cd1cSSteven Whitehouse /** 8602ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 8616c960e68SChristian Brauner * @idmap: idmap of the mount the inode was found from 8622ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8632ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8642ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 865c551f66cSLee Jones * @excl: Force fail if inode exists 8662ab9cd1cSSteven Whitehouse * 8672ab9cd1cSSteven Whitehouse * Returns: errno 8682ab9cd1cSSteven Whitehouse */ 8692ab9cd1cSSteven Whitehouse 8706c960e68SChristian Brauner static int gfs2_create(struct mnt_idmap *idmap, struct inode *dir, 871549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 8722ab9cd1cSSteven Whitehouse { 873b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 8742ab9cd1cSSteven Whitehouse } 8752ab9cd1cSSteven Whitehouse 8762ab9cd1cSSteven Whitehouse /** 8776d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8782ab9cd1cSSteven Whitehouse * @dir: The directory inode 8792ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8806d4ade98SSteven Whitehouse * @file: File to be opened 8812ab9cd1cSSteven Whitehouse * 8822ab9cd1cSSteven Whitehouse * 8832ab9cd1cSSteven Whitehouse * Returns: errno 8842ab9cd1cSSteven Whitehouse */ 8852ab9cd1cSSteven Whitehouse 8866d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 887b452a458SAl Viro struct file *file) 8882ab9cd1cSSteven Whitehouse { 8896d4ade98SSteven Whitehouse struct inode *inode; 8906d4ade98SSteven Whitehouse struct dentry *d; 8912ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8926d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8932ab9cd1cSSteven Whitehouse int error; 8946d4ade98SSteven Whitehouse 8956d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8967b7a9115SBenjamin Coddington if (inode == NULL) { 8977b7a9115SBenjamin Coddington d_add(dentry, NULL); 8986d4ade98SSteven Whitehouse return NULL; 8997b7a9115SBenjamin Coddington } 9006d4ade98SSteven Whitehouse if (IS_ERR(inode)) 9016d4ade98SSteven Whitehouse return ERR_CAST(inode); 9026d4ade98SSteven Whitehouse 9036d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 9042ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 9052ab9cd1cSSteven Whitehouse if (error) { 9062ab9cd1cSSteven Whitehouse iput(inode); 9072ab9cd1cSSteven Whitehouse return ERR_PTR(error); 9082ab9cd1cSSteven Whitehouse } 9096d4ade98SSteven Whitehouse 9106d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 911d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 912d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 913d57b9c9aSJ. Bruce Fields return d; 914d57b9c9aSJ. Bruce Fields } 9156d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 916be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 9176d4ade98SSteven Whitehouse 9182ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 9195ca1db41SMiklos Szeredi if (error) { 9205ca1db41SMiklos Szeredi dput(d); 9216d4ade98SSteven Whitehouse return ERR_PTR(error); 9225ca1db41SMiklos Szeredi } 9236d4ade98SSteven Whitehouse return d; 9242ab9cd1cSSteven Whitehouse } 9256d4ade98SSteven Whitehouse 9266d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 9276d4ade98SSteven Whitehouse unsigned flags) 9286d4ade98SSteven Whitehouse { 929b452a458SAl Viro return __gfs2_lookup(dir, dentry, NULL); 9302ab9cd1cSSteven Whitehouse } 9312ab9cd1cSSteven Whitehouse 9322ab9cd1cSSteven Whitehouse /** 9332ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 9342ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 9352ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 9362ab9cd1cSSteven Whitehouse * @dentry: The name of the link 9372ab9cd1cSSteven Whitehouse * 9382ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 9392ab9cd1cSSteven Whitehouse * name in "dentry". 9402ab9cd1cSSteven Whitehouse * 9412ab9cd1cSSteven Whitehouse * Returns: errno 9422ab9cd1cSSteven Whitehouse */ 9432ab9cd1cSSteven Whitehouse 9442ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 9452ab9cd1cSSteven Whitehouse struct dentry *dentry) 9462ab9cd1cSSteven Whitehouse { 9472ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9482ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9492b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 9502ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9512d084780SAndrew Price struct gfs2_holder d_gh, gh; 9522ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 95319aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 9542ab9cd1cSSteven Whitehouse int error; 9552ab9cd1cSSteven Whitehouse 9562ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9572ab9cd1cSSteven Whitehouse return -EPERM; 9582ab9cd1cSSteven Whitehouse 9592fba46a0SBob Peterson error = gfs2_qa_get(dip); 9600a305e49SBob Peterson if (error) 9610a305e49SBob Peterson return error; 9620a305e49SBob Peterson 9632d084780SAndrew Price gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); 9642d084780SAndrew Price gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 9652ab9cd1cSSteven Whitehouse 9662d084780SAndrew Price error = gfs2_glock_nq(&d_gh); 9672ab9cd1cSSteven Whitehouse if (error) 9682ab9cd1cSSteven Whitehouse goto out_parent; 9692ab9cd1cSSteven Whitehouse 9702d084780SAndrew Price error = gfs2_glock_nq(&gh); 9712ab9cd1cSSteven Whitehouse if (error) 9722ab9cd1cSSteven Whitehouse goto out_child; 9732ab9cd1cSSteven Whitehouse 9742ab9cd1cSSteven Whitehouse error = -ENOENT; 9752ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9762ab9cd1cSSteven Whitehouse goto out_gunlock; 9772ab9cd1cSSteven Whitehouse 9784609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, dir, MAY_WRITE | MAY_EXEC); 9792ab9cd1cSSteven Whitehouse if (error) 9802ab9cd1cSSteven Whitehouse goto out_gunlock; 9812ab9cd1cSSteven Whitehouse 9822ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9832ab9cd1cSSteven Whitehouse switch (error) { 9842ab9cd1cSSteven Whitehouse case -ENOENT: 9852ab9cd1cSSteven Whitehouse break; 9862ab9cd1cSSteven Whitehouse case 0: 9872ab9cd1cSSteven Whitehouse error = -EEXIST; 988e5966cf2SGustavo A. R. Silva goto out_gunlock; 9892ab9cd1cSSteven Whitehouse default: 9902ab9cd1cSSteven Whitehouse goto out_gunlock; 9912ab9cd1cSSteven Whitehouse } 9922ab9cd1cSSteven Whitehouse 9932ab9cd1cSSteven Whitehouse error = -EINVAL; 9942ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9952ab9cd1cSSteven Whitehouse goto out_gunlock; 9962ab9cd1cSSteven Whitehouse error = -EFBIG; 9972ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9982ab9cd1cSSteven Whitehouse goto out_gunlock; 9992ab9cd1cSSteven Whitehouse error = -EPERM; 10002ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 10012ab9cd1cSSteven Whitehouse goto out_gunlock; 10022ab9cd1cSSteven Whitehouse error = -EMLINK; 10032ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 10042ab9cd1cSSteven Whitehouse goto out_gunlock; 10052ab9cd1cSSteven Whitehouse 10063c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 10072ab9cd1cSSteven Whitehouse if (error < 0) 10082ab9cd1cSSteven Whitehouse goto out_gunlock; 10092ab9cd1cSSteven Whitehouse 10103c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 10113c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1012b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 10132ab9cd1cSSteven Whitehouse if (error) 10145407e242SBob Peterson goto out_gunlock; 10152ab9cd1cSSteven Whitehouse 10167b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 10172ab9cd1cSSteven Whitehouse if (error) 10182ab9cd1cSSteven Whitehouse goto out_gunlock_q; 10192ab9cd1cSSteven Whitehouse 1020534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 10212ab9cd1cSSteven Whitehouse if (error) 10222ab9cd1cSSteven Whitehouse goto out_ipres; 10232ab9cd1cSSteven Whitehouse } else { 10242ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 10252ab9cd1cSSteven Whitehouse if (error) 10262ab9cd1cSSteven Whitehouse goto out_ipres; 10272ab9cd1cSSteven Whitehouse } 10282ab9cd1cSSteven Whitehouse 10292ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 10302ab9cd1cSSteven Whitehouse if (error) 10312ab9cd1cSSteven Whitehouse goto out_end_trans; 10322ab9cd1cSSteven Whitehouse 10332b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 10342ab9cd1cSSteven Whitehouse if (error) 10352ab9cd1cSSteven Whitehouse goto out_brelse; 10362ab9cd1cSSteven Whitehouse 1037350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 10382ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 10398a8b8d91SJeff Layton inode_set_ctime_current(&ip->i_inode); 1040ab9bbda0SSteven Whitehouse ihold(inode); 1041ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 1042ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 10432ab9cd1cSSteven Whitehouse 10442ab9cd1cSSteven Whitehouse out_brelse: 10452ab9cd1cSSteven Whitehouse brelse(dibh); 10462ab9cd1cSSteven Whitehouse out_end_trans: 10472ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10482ab9cd1cSSteven Whitehouse out_ipres: 10493c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10502ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10512ab9cd1cSSteven Whitehouse out_gunlock_q: 10523c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10532ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10542ab9cd1cSSteven Whitehouse out_gunlock: 10552b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 10562d084780SAndrew Price gfs2_glock_dq(&gh); 10572ab9cd1cSSteven Whitehouse out_child: 10582d084780SAndrew Price gfs2_glock_dq(&d_gh); 10592ab9cd1cSSteven Whitehouse out_parent: 10602297ab61SBob Peterson gfs2_qa_put(dip); 10612d084780SAndrew Price gfs2_holder_uninit(&d_gh); 10622d084780SAndrew Price gfs2_holder_uninit(&gh); 10632ab9cd1cSSteven Whitehouse return error; 10642ab9cd1cSSteven Whitehouse } 10652ab9cd1cSSteven Whitehouse 10662ab9cd1cSSteven Whitehouse /* 10672ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10682ab9cd1cSSteven Whitehouse * @dip: the directory 10692ab9cd1cSSteven Whitehouse * @name: the name of the file 10702ab9cd1cSSteven Whitehouse * @ip: the inode 10712ab9cd1cSSteven Whitehouse * 10722ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10732ab9cd1cSSteven Whitehouse * 10742ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10752ab9cd1cSSteven Whitehouse */ 10762ab9cd1cSSteven Whitehouse 10772ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10782ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10792ab9cd1cSSteven Whitehouse { 10802ab9cd1cSSteven Whitehouse int error; 10812ab9cd1cSSteven Whitehouse 10822ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10832ab9cd1cSSteven Whitehouse return -EPERM; 10842ab9cd1cSSteven Whitehouse 10852ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10866b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10876b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10882ab9cd1cSSteven Whitehouse return -EPERM; 10892ab9cd1cSSteven Whitehouse 10902ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10912ab9cd1cSSteven Whitehouse return -EPERM; 10922ab9cd1cSSteven Whitehouse 10934609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode, 1094549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 10952ab9cd1cSSteven Whitehouse if (error) 10962ab9cd1cSSteven Whitehouse return error; 10972ab9cd1cSSteven Whitehouse 109837975f15SFabian Frederick return gfs2_dir_check(&dip->i_inode, name, ip); 10992ab9cd1cSSteven Whitehouse } 11002ab9cd1cSSteven Whitehouse 11012ab9cd1cSSteven Whitehouse /** 11022ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 11032ab9cd1cSSteven Whitehouse * @dip: The parent directory 1104c551f66cSLee Jones * @dentry: The dentry to unlink 11052ab9cd1cSSteven Whitehouse * 11062ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 11072ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 11082ab9cd1cSSteven Whitehouse * 11092ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 11102ab9cd1cSSteven Whitehouse */ 11112ab9cd1cSSteven Whitehouse 11122ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 11134327a9bfSBob Peterson const struct dentry *dentry) 11142ab9cd1cSSteven Whitehouse { 11152b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11162ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11172ab9cd1cSSteven Whitehouse int error; 11182ab9cd1cSSteven Whitehouse 11192ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 11202ab9cd1cSSteven Whitehouse if (error) 11212ab9cd1cSSteven Whitehouse return error; 11222ab9cd1cSSteven Whitehouse 11232ab9cd1cSSteven Whitehouse ip->i_entries = 0; 11248a8b8d91SJeff Layton inode_set_ctime_current(inode); 11252ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 11262ab9cd1cSSteven Whitehouse clear_nlink(inode); 11272ab9cd1cSSteven Whitehouse else 11282ab9cd1cSSteven Whitehouse drop_nlink(inode); 11292ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 11302ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11312ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 11322ab9cd1cSSteven Whitehouse return 0; 11332ab9cd1cSSteven Whitehouse } 11342ab9cd1cSSteven Whitehouse 11352ab9cd1cSSteven Whitehouse 11362ab9cd1cSSteven Whitehouse /** 11372ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 11382ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 11392ab9cd1cSSteven Whitehouse * @dentry: The file itself 11402ab9cd1cSSteven Whitehouse * 11412ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 11422ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 11432ab9cd1cSSteven Whitehouse * 11442ab9cd1cSSteven Whitehouse * Returns: errno 11452ab9cd1cSSteven Whitehouse */ 11462ab9cd1cSSteven Whitehouse 11472ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11482ab9cd1cSSteven Whitehouse { 11492ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11502ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11512b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11522ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 115314a58517SAndrew Price struct gfs2_holder d_gh, r_gh, gh; 11542ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11555e2f7d61SBob Peterson int error; 11565e2f7d61SBob Peterson 11575e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11585e2f7d61SBob Peterson if (error) 11595e2f7d61SBob Peterson return error; 11605e2f7d61SBob Peterson 11615e2f7d61SBob Peterson error = -EROFS; 11622ab9cd1cSSteven Whitehouse 116314a58517SAndrew Price gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); 116414a58517SAndrew Price gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 11652ab9cd1cSSteven Whitehouse 116666fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1167a365fbf3SSteven Whitehouse if (!rgd) 116887654896SSteven Whitehouse goto out_inodes; 1169a365fbf3SSteven Whitehouse 117014a58517SAndrew Price gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, &r_gh); 11712ab9cd1cSSteven Whitehouse 11722ab9cd1cSSteven Whitehouse 117314a58517SAndrew Price error = gfs2_glock_nq(&d_gh); 11742ab9cd1cSSteven Whitehouse if (error) 11752ab9cd1cSSteven Whitehouse goto out_parent; 11762ab9cd1cSSteven Whitehouse 117714a58517SAndrew Price error = gfs2_glock_nq(&gh); 11782ab9cd1cSSteven Whitehouse if (error) 11792ab9cd1cSSteven Whitehouse goto out_child; 11802ab9cd1cSSteven Whitehouse 11812ab9cd1cSSteven Whitehouse error = -ENOENT; 11822ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11832ab9cd1cSSteven Whitehouse goto out_rgrp; 11842ab9cd1cSSteven Whitehouse 11852ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11862ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11872ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11882ab9cd1cSSteven Whitehouse goto out_rgrp; 11892ab9cd1cSSteven Whitehouse } 11902ab9cd1cSSteven Whitehouse 119114a58517SAndrew Price error = gfs2_glock_nq(&r_gh); /* rgrp */ 11922ab9cd1cSSteven Whitehouse if (error) 11932ab9cd1cSSteven Whitehouse goto out_rgrp; 11942ab9cd1cSSteven Whitehouse 11952ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11962ab9cd1cSSteven Whitehouse if (error) 11972ab9cd1cSSteven Whitehouse goto out_gunlock; 11982ab9cd1cSSteven Whitehouse 11992ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 12002ab9cd1cSSteven Whitehouse if (error) 12012eb5909dSBob Peterson goto out_gunlock; 12022ab9cd1cSSteven Whitehouse 12034327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 12042ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 12052eb5909dSBob Peterson 12062ab9cd1cSSteven Whitehouse out_gunlock: 120714a58517SAndrew Price gfs2_glock_dq(&r_gh); 12082ab9cd1cSSteven Whitehouse out_rgrp: 120914a58517SAndrew Price gfs2_glock_dq(&gh); 12102ab9cd1cSSteven Whitehouse out_child: 121114a58517SAndrew Price gfs2_glock_dq(&d_gh); 12122ab9cd1cSSteven Whitehouse out_parent: 121314a58517SAndrew Price gfs2_holder_uninit(&r_gh); 121487654896SSteven Whitehouse out_inodes: 121514a58517SAndrew Price gfs2_holder_uninit(&gh); 121614a58517SAndrew Price gfs2_holder_uninit(&d_gh); 12172ab9cd1cSSteven Whitehouse return error; 12182ab9cd1cSSteven Whitehouse } 12192ab9cd1cSSteven Whitehouse 12202ab9cd1cSSteven Whitehouse /** 12212ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 12227a77db95SChristian Brauner * @idmap: idmap of the mount the inode was found from 12232ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 12242ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 12252ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 12262ab9cd1cSSteven Whitehouse * 12272ab9cd1cSSteven Whitehouse * Returns: errno 12282ab9cd1cSSteven Whitehouse */ 12292ab9cd1cSSteven Whitehouse 12307a77db95SChristian Brauner static int gfs2_symlink(struct mnt_idmap *idmap, struct inode *dir, 1231549c7297SChristian Brauner struct dentry *dentry, const char *symname) 12322ab9cd1cSSteven Whitehouse { 1233160b4026SSteven Whitehouse unsigned int size; 12342ab9cd1cSSteven Whitehouse 12352ab9cd1cSSteven Whitehouse size = strlen(symname); 1236235628c5SAndreas Gruenbacher if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 12372ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 12382ab9cd1cSSteven Whitehouse 1239b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 12402ab9cd1cSSteven Whitehouse } 12412ab9cd1cSSteven Whitehouse 12422ab9cd1cSSteven Whitehouse /** 12432ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 1244c54bd91eSChristian Brauner * @idmap: idmap of the mount the inode was found from 12452ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12462ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12472ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12482ab9cd1cSSteven Whitehouse * 12492ab9cd1cSSteven Whitehouse * Returns: errno 12502ab9cd1cSSteven Whitehouse */ 12512ab9cd1cSSteven Whitehouse 1252c54bd91eSChristian Brauner static int gfs2_mkdir(struct mnt_idmap *idmap, struct inode *dir, 1253549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 12542ab9cd1cSSteven Whitehouse { 1255235628c5SAndreas Gruenbacher unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1256b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 12572ab9cd1cSSteven Whitehouse } 12582ab9cd1cSSteven Whitehouse 12592ab9cd1cSSteven Whitehouse /** 12602ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 12615ebb29beSChristian Brauner * @idmap: idmap of the mount the inode was found from 12622ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12632ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12642ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1265f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12662ab9cd1cSSteven Whitehouse * 12672ab9cd1cSSteven Whitehouse */ 12682ab9cd1cSSteven Whitehouse 12695ebb29beSChristian Brauner static int gfs2_mknod(struct mnt_idmap *idmap, struct inode *dir, 1270549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t dev) 12712ab9cd1cSSteven Whitehouse { 1272b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 12736d4ade98SSteven Whitehouse } 12746d4ade98SSteven Whitehouse 12756d4ade98SSteven Whitehouse /** 12766d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12776d4ade98SSteven Whitehouse * @dir: The directory 12786d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12796d4ade98SSteven Whitehouse * @file: The proposed new struct file 12806d4ade98SSteven Whitehouse * @flags: open flags 12816d4ade98SSteven Whitehouse * @mode: File mode 12826d4ade98SSteven Whitehouse * 12836d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12846d4ade98SSteven Whitehouse */ 12856d4ade98SSteven Whitehouse 12866d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12876d4ade98SSteven Whitehouse struct file *file, unsigned flags, 128844907d79SAl Viro umode_t mode) 12896d4ade98SSteven Whitehouse { 12906d4ade98SSteven Whitehouse struct dentry *d; 12916d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12926d4ade98SSteven Whitehouse 129300699ad8SAl Viro if (!d_in_lookup(dentry)) 12944d93bc3eSAl Viro goto skip_lookup; 12954d93bc3eSAl Viro 1296b452a458SAl Viro d = __gfs2_lookup(dir, dentry, file); 12976d4ade98SSteven Whitehouse if (IS_ERR(d)) 12986d4ade98SSteven Whitehouse return PTR_ERR(d); 12995ca1db41SMiklos Szeredi if (d != NULL) 13005ca1db41SMiklos Szeredi dentry = d; 13012b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1302aad888f8SAl Viro if (!(file->f_mode & FMODE_OPENED)) 1303ec7d879cSAl Viro return finish_no_open(file, d); 13045ca1db41SMiklos Szeredi dput(d); 130521039132SAl Viro return excl && (flags & O_CREAT) ? -EEXIST : 0; 13066d4ade98SSteven Whitehouse } 13076d4ade98SSteven Whitehouse 13085ca1db41SMiklos Szeredi BUG_ON(d != NULL); 13094d93bc3eSAl Viro 13104d93bc3eSAl Viro skip_lookup: 13116d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 13126d4ade98SSteven Whitehouse return -ENOENT; 13136d4ade98SSteven Whitehouse 1314b452a458SAl Viro return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 13152ab9cd1cSSteven Whitehouse } 13162ab9cd1cSSteven Whitehouse 13172ab9cd1cSSteven Whitehouse /* 13182ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 13192ab9cd1cSSteven Whitehouse * @this: move this 13202ab9cd1cSSteven Whitehouse * @to: to here 13212ab9cd1cSSteven Whitehouse * 13222ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 13232ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 13242ab9cd1cSSteven Whitehouse * 13252ab9cd1cSSteven Whitehouse * Returns: errno 13262ab9cd1cSSteven Whitehouse */ 13272ab9cd1cSSteven Whitehouse 13282ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 13292ab9cd1cSSteven Whitehouse { 13302ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 13312ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 13322ab9cd1cSSteven Whitehouse struct inode *tmp; 13332ab9cd1cSSteven Whitehouse int error = 0; 13342ab9cd1cSSteven Whitehouse 13352ab9cd1cSSteven Whitehouse igrab(dir); 13362ab9cd1cSSteven Whitehouse 13372ab9cd1cSSteven Whitehouse for (;;) { 13382ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 13392ab9cd1cSSteven Whitehouse error = -EINVAL; 13402ab9cd1cSSteven Whitehouse break; 13412ab9cd1cSSteven Whitehouse } 13422b0143b5SDavid Howells if (dir == d_inode(sb->s_root)) { 13432ab9cd1cSSteven Whitehouse error = 0; 13442ab9cd1cSSteven Whitehouse break; 13452ab9cd1cSSteven Whitehouse } 13462ab9cd1cSSteven Whitehouse 13472ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 134848f8f711SAbhi Das if (!tmp) { 134948f8f711SAbhi Das error = -ENOENT; 135048f8f711SAbhi Das break; 135148f8f711SAbhi Das } 13522ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13532ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13542ab9cd1cSSteven Whitehouse break; 13552ab9cd1cSSteven Whitehouse } 13562ab9cd1cSSteven Whitehouse 13572ab9cd1cSSteven Whitehouse iput(dir); 13582ab9cd1cSSteven Whitehouse dir = tmp; 13592ab9cd1cSSteven Whitehouse } 13602ab9cd1cSSteven Whitehouse 13612ab9cd1cSSteven Whitehouse iput(dir); 13622ab9cd1cSSteven Whitehouse 13632ab9cd1cSSteven Whitehouse return error; 13642ab9cd1cSSteven Whitehouse } 13652ab9cd1cSSteven Whitehouse 13662ab9cd1cSSteven Whitehouse /** 1367a63b7bbcSBenjamin Marzinski * update_moved_ino - Update an inode that's being moved 1368a63b7bbcSBenjamin Marzinski * @ip: The inode being moved 1369a63b7bbcSBenjamin Marzinski * @ndip: The parent directory of the new filename 1370a63b7bbcSBenjamin Marzinski * @dir_rename: True of ip is a directory 1371a63b7bbcSBenjamin Marzinski * 1372a63b7bbcSBenjamin Marzinski * Returns: errno 1373a63b7bbcSBenjamin Marzinski */ 1374a63b7bbcSBenjamin Marzinski 1375a63b7bbcSBenjamin Marzinski static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1376a63b7bbcSBenjamin Marzinski int dir_rename) 1377a63b7bbcSBenjamin Marzinski { 1378a63b7bbcSBenjamin Marzinski if (dir_rename) 1379a63b7bbcSBenjamin Marzinski return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1380a63b7bbcSBenjamin Marzinski 13818a8b8d91SJeff Layton inode_set_ctime_current(&ip->i_inode); 138283998ccdSAndreas Gruenbacher mark_inode_dirty_sync(&ip->i_inode); 1383a63b7bbcSBenjamin Marzinski return 0; 1384a63b7bbcSBenjamin Marzinski } 1385a63b7bbcSBenjamin Marzinski 1386a63b7bbcSBenjamin Marzinski 1387a63b7bbcSBenjamin Marzinski /** 13882ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13892ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13902ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13912ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13922ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13932ab9cd1cSSteven Whitehouse * 13942ab9cd1cSSteven Whitehouse * Returns: errno 13952ab9cd1cSSteven Whitehouse */ 13962ab9cd1cSSteven Whitehouse 13972ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13982ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13992ab9cd1cSSteven Whitehouse { 14002ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 14012ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 14022b0143b5SDavid Howells struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 14032ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 14042ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 1405bc74aaefSBob Peterson struct gfs2_holder ghs[4], r_gh, rd_gh; 14062ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 14072ab9cd1cSSteven Whitehouse unsigned int num_gh; 14082ab9cd1cSSteven Whitehouse int dir_rename = 0; 140919aeb5a6SBob Peterson struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 14102ab9cd1cSSteven Whitehouse unsigned int x; 14112ab9cd1cSSteven Whitehouse int error; 14122ab9cd1cSSteven Whitehouse 14136df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1414bc74aaefSBob Peterson gfs2_holder_mark_uninitialized(&rd_gh); 14152b0143b5SDavid Howells if (d_really_is_positive(ndentry)) { 14162b0143b5SDavid Howells nip = GFS2_I(d_inode(ndentry)); 14172ab9cd1cSSteven Whitehouse if (ip == nip) 14182ab9cd1cSSteven Whitehouse return 0; 14192ab9cd1cSSteven Whitehouse } 14202ab9cd1cSSteven Whitehouse 14215e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 14225e2f7d61SBob Peterson if (error) 14235e2f7d61SBob Peterson return error; 14245e2f7d61SBob Peterson 14252fba46a0SBob Peterson error = gfs2_qa_get(ndip); 14260a305e49SBob Peterson if (error) 14270a305e49SBob Peterson return error; 14280a305e49SBob Peterson 14292ab9cd1cSSteven Whitehouse if (odip != ndip) { 14302ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 14312ab9cd1cSSteven Whitehouse 0, &r_gh); 14322ab9cd1cSSteven Whitehouse if (error) 14332ab9cd1cSSteven Whitehouse goto out; 14342ab9cd1cSSteven Whitehouse 14352ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 14362ab9cd1cSSteven Whitehouse dir_rename = 1; 1437a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 14382ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 14392ab9cd1cSSteven Whitehouse if (error) 14402ab9cd1cSSteven Whitehouse goto out_gunlock_r; 14412ab9cd1cSSteven Whitehouse } 14422ab9cd1cSSteven Whitehouse } 14432ab9cd1cSSteven Whitehouse 14442ab9cd1cSSteven Whitehouse num_gh = 1; 1445ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 14462ab9cd1cSSteven Whitehouse if (odip != ndip) { 1447ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1448ad26967bSBob Peterson ghs + num_gh); 14492ab9cd1cSSteven Whitehouse num_gh++; 14502ab9cd1cSSteven Whitehouse } 1451ad26967bSBob Peterson gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 14522ab9cd1cSSteven Whitehouse num_gh++; 14532ab9cd1cSSteven Whitehouse 14542ab9cd1cSSteven Whitehouse if (nip) { 1455ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1456ad26967bSBob Peterson ghs + num_gh); 14572ab9cd1cSSteven Whitehouse num_gh++; 14582ab9cd1cSSteven Whitehouse } 14592ab9cd1cSSteven Whitehouse 14602ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 14612ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 14622ab9cd1cSSteven Whitehouse if (error) 14632ab9cd1cSSteven Whitehouse goto out_gunlock; 14642ab9cd1cSSteven Whitehouse } 1465ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1466ad26967bSBob Peterson if (error) 1467ad26967bSBob Peterson goto out_gunlock; 14682ab9cd1cSSteven Whitehouse 1469bc74aaefSBob Peterson if (nip) { 1470bc74aaefSBob Peterson /* Grab the resource group glock for unlink flag twiddling. 1471bc74aaefSBob Peterson * This is the case where the target dinode already exists 1472bc74aaefSBob Peterson * so we unlink before doing the rename. 1473bc74aaefSBob Peterson */ 1474bc74aaefSBob Peterson nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1475bc74aaefSBob Peterson if (!nrgd) { 1476bc74aaefSBob Peterson error = -ENOENT; 1477bc74aaefSBob Peterson goto out_gunlock; 1478bc74aaefSBob Peterson } 14794fc7ec31SBob Peterson error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 14804fc7ec31SBob Peterson LM_FLAG_NODE_SCOPE, &rd_gh); 1481bc74aaefSBob Peterson if (error) 1482bc74aaefSBob Peterson goto out_gunlock; 1483bc74aaefSBob Peterson } 1484bc74aaefSBob Peterson 14852ab9cd1cSSteven Whitehouse error = -ENOENT; 14862ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14872ab9cd1cSSteven Whitehouse goto out_gunlock; 14882ab9cd1cSSteven Whitehouse 14892ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14902ab9cd1cSSteven Whitehouse 14912ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14922ab9cd1cSSteven Whitehouse if (error) 14932ab9cd1cSSteven Whitehouse goto out_gunlock; 14942ab9cd1cSSteven Whitehouse 14952ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14962ab9cd1cSSteven Whitehouse 14972ab9cd1cSSteven Whitehouse if (nip) { 14982ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14992ab9cd1cSSteven Whitehouse if (error) 15002ab9cd1cSSteven Whitehouse goto out_gunlock; 15012ab9cd1cSSteven Whitehouse 15022ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 15032ab9cd1cSSteven Whitehouse error = -EAGAIN; 15042ab9cd1cSSteven Whitehouse goto out_gunlock; 15052ab9cd1cSSteven Whitehouse } 15062ab9cd1cSSteven Whitehouse 15072ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 15082ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 15092ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 15102ab9cd1cSSteven Whitehouse error = -EIO; 15112ab9cd1cSSteven Whitehouse goto out_gunlock; 15122ab9cd1cSSteven Whitehouse } 15132ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 15142ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 15152ab9cd1cSSteven Whitehouse goto out_gunlock; 15162ab9cd1cSSteven Whitehouse } 15172ab9cd1cSSteven Whitehouse } 15182ab9cd1cSSteven Whitehouse } else { 15194609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, ndir, 1520549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 15212ab9cd1cSSteven Whitehouse if (error) 15222ab9cd1cSSteven Whitehouse goto out_gunlock; 15232ab9cd1cSSteven Whitehouse 15242ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 15252ab9cd1cSSteven Whitehouse switch (error) { 15262ab9cd1cSSteven Whitehouse case -ENOENT: 15272ab9cd1cSSteven Whitehouse error = 0; 15282ab9cd1cSSteven Whitehouse break; 15292ab9cd1cSSteven Whitehouse case 0: 15302ab9cd1cSSteven Whitehouse error = -EEXIST; 1531e5966cf2SGustavo A. R. Silva goto out_gunlock; 15322ab9cd1cSSteven Whitehouse default: 15332ab9cd1cSSteven Whitehouse goto out_gunlock; 1534098b9c14SAliasgar Surti } 15352ab9cd1cSSteven Whitehouse 15362ab9cd1cSSteven Whitehouse if (odip != ndip) { 15372ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 15382ab9cd1cSSteven Whitehouse error = -ENOENT; 15392ab9cd1cSSteven Whitehouse goto out_gunlock; 15402ab9cd1cSSteven Whitehouse } 15412ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 15422ab9cd1cSSteven Whitehouse error = -EFBIG; 15432ab9cd1cSSteven Whitehouse goto out_gunlock; 15442ab9cd1cSSteven Whitehouse } 15452ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 15462ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 15472ab9cd1cSSteven Whitehouse error = -EMLINK; 15482ab9cd1cSSteven Whitehouse goto out_gunlock; 15492ab9cd1cSSteven Whitehouse } 15502ab9cd1cSSteven Whitehouse } 15512ab9cd1cSSteven Whitehouse } 15522ab9cd1cSSteven Whitehouse 15532ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 15542ab9cd1cSSteven Whitehouse 15552ab9cd1cSSteven Whitehouse if (dir_rename) { 15564609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, d_inode(odentry), 1557549c7297SChristian Brauner MAY_WRITE); 15582ab9cd1cSSteven Whitehouse if (error) 15592ab9cd1cSSteven Whitehouse goto out_gunlock; 15602ab9cd1cSSteven Whitehouse } 15612ab9cd1cSSteven Whitehouse 15623c1c0ae1SSteven Whitehouse if (nip == NULL) { 15633c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 15643c1c0ae1SSteven Whitehouse if (error) 15652ab9cd1cSSteven Whitehouse goto out_gunlock; 15663c1c0ae1SSteven Whitehouse } 15672ab9cd1cSSteven Whitehouse 15683c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 15693c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1570b8fbf471SAbhi Das error = gfs2_quota_lock_check(ndip, &ap); 15712ab9cd1cSSteven Whitehouse if (error) 15725407e242SBob Peterson goto out_gunlock; 15732ab9cd1cSSteven Whitehouse 15747b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 15752ab9cd1cSSteven Whitehouse if (error) 15762ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15772ab9cd1cSSteven Whitehouse 1578534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1579534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 15802ab9cd1cSSteven Whitehouse if (error) 15812ab9cd1cSSteven Whitehouse goto out_ipreserv; 15822ab9cd1cSSteven Whitehouse } else { 15832ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 15842ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 15852ab9cd1cSSteven Whitehouse if (error) 15862ab9cd1cSSteven Whitehouse goto out_gunlock; 15872ab9cd1cSSteven Whitehouse } 15882ab9cd1cSSteven Whitehouse 15892ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15902ab9cd1cSSteven Whitehouse 15914327a9bfSBob Peterson if (nip) 15924327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15932ab9cd1cSSteven Whitehouse 1594a63b7bbcSBenjamin Marzinski error = update_moved_ino(ip, ndip, dir_rename); 15952ab9cd1cSSteven Whitehouse if (error) 15962ab9cd1cSSteven Whitehouse goto out_end_trans; 15972ab9cd1cSSteven Whitehouse 15982ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15992ab9cd1cSSteven Whitehouse if (error) 16002ab9cd1cSSteven Whitehouse goto out_end_trans; 16012ab9cd1cSSteven Whitehouse 16022b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 16032ab9cd1cSSteven Whitehouse if (error) 16042ab9cd1cSSteven Whitehouse goto out_end_trans; 16052ab9cd1cSSteven Whitehouse 16062ab9cd1cSSteven Whitehouse out_end_trans: 16072ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 16082ab9cd1cSSteven Whitehouse out_ipreserv: 16093c1c0ae1SSteven Whitehouse if (da.nr_blocks) 16102ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 16112ab9cd1cSSteven Whitehouse out_gunlock_q: 16123c1c0ae1SSteven Whitehouse if (da.nr_blocks) 16132ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 16142ab9cd1cSSteven Whitehouse out_gunlock: 16152b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1616bc74aaefSBob Peterson if (gfs2_holder_initialized(&rd_gh)) 1617bc74aaefSBob Peterson gfs2_glock_dq_uninit(&rd_gh); 1618bc74aaefSBob Peterson 16192ab9cd1cSSteven Whitehouse while (x--) { 1620ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 16212ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 16222ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 16232ab9cd1cSSteven Whitehouse } 16242ab9cd1cSSteven Whitehouse out_gunlock_r: 16256df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 16262ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 16272ab9cd1cSSteven Whitehouse out: 16282fba46a0SBob Peterson gfs2_qa_put(ndip); 16292ab9cd1cSSteven Whitehouse return error; 16302ab9cd1cSSteven Whitehouse } 16312ab9cd1cSSteven Whitehouse 16322ab9cd1cSSteven Whitehouse /** 1633a63b7bbcSBenjamin Marzinski * gfs2_exchange - exchange two files 1634a63b7bbcSBenjamin Marzinski * @odir: Parent directory of old file name 1635a63b7bbcSBenjamin Marzinski * @odentry: The old dentry of the file 1636a63b7bbcSBenjamin Marzinski * @ndir: Parent directory of new file name 1637a63b7bbcSBenjamin Marzinski * @ndentry: The new dentry of the file 1638a63b7bbcSBenjamin Marzinski * @flags: The rename flags 1639a63b7bbcSBenjamin Marzinski * 1640a63b7bbcSBenjamin Marzinski * Returns: errno 1641a63b7bbcSBenjamin Marzinski */ 1642a63b7bbcSBenjamin Marzinski 1643a63b7bbcSBenjamin Marzinski static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1644a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1645a63b7bbcSBenjamin Marzinski unsigned int flags) 1646a63b7bbcSBenjamin Marzinski { 1647a63b7bbcSBenjamin Marzinski struct gfs2_inode *odip = GFS2_I(odir); 1648a63b7bbcSBenjamin Marzinski struct gfs2_inode *ndip = GFS2_I(ndir); 1649a63b7bbcSBenjamin Marzinski struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1650a63b7bbcSBenjamin Marzinski struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1651a63b7bbcSBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(odir); 1652ad26967bSBob Peterson struct gfs2_holder ghs[4], r_gh; 1653a63b7bbcSBenjamin Marzinski unsigned int num_gh; 1654a63b7bbcSBenjamin Marzinski unsigned int x; 1655a63b7bbcSBenjamin Marzinski umode_t old_mode = oip->i_inode.i_mode; 1656a63b7bbcSBenjamin Marzinski umode_t new_mode = nip->i_inode.i_mode; 1657a63b7bbcSBenjamin Marzinski int error; 1658a63b7bbcSBenjamin Marzinski 16596df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1660a63b7bbcSBenjamin Marzinski error = gfs2_rindex_update(sdp); 1661a63b7bbcSBenjamin Marzinski if (error) 1662a63b7bbcSBenjamin Marzinski return error; 1663a63b7bbcSBenjamin Marzinski 1664a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1665a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1666a63b7bbcSBenjamin Marzinski 0, &r_gh); 1667a63b7bbcSBenjamin Marzinski if (error) 1668a63b7bbcSBenjamin Marzinski goto out; 1669a63b7bbcSBenjamin Marzinski 1670a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1671a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1672a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(oip, ndip); 1673a63b7bbcSBenjamin Marzinski if (error) 1674a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1675a63b7bbcSBenjamin Marzinski } 1676a63b7bbcSBenjamin Marzinski 1677a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1678a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1679a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(nip, odip); 1680a63b7bbcSBenjamin Marzinski if (error) 1681a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1682a63b7bbcSBenjamin Marzinski } 1683a63b7bbcSBenjamin Marzinski } 1684a63b7bbcSBenjamin Marzinski 1685a63b7bbcSBenjamin Marzinski num_gh = 1; 1686ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1687a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1688ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1689ad26967bSBob Peterson ghs + num_gh); 1690a63b7bbcSBenjamin Marzinski num_gh++; 1691a63b7bbcSBenjamin Marzinski } 1692ad26967bSBob Peterson gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1693a63b7bbcSBenjamin Marzinski num_gh++; 1694a63b7bbcSBenjamin Marzinski 1695ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1696a63b7bbcSBenjamin Marzinski num_gh++; 1697a63b7bbcSBenjamin Marzinski 1698a63b7bbcSBenjamin Marzinski for (x = 0; x < num_gh; x++) { 1699a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq(ghs + x); 1700a63b7bbcSBenjamin Marzinski if (error) 1701a63b7bbcSBenjamin Marzinski goto out_gunlock; 1702a63b7bbcSBenjamin Marzinski } 1703a63b7bbcSBenjamin Marzinski 1704ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1705ad26967bSBob Peterson if (error) 1706ad26967bSBob Peterson goto out_gunlock; 1707ad26967bSBob Peterson 1708a63b7bbcSBenjamin Marzinski error = -ENOENT; 1709a63b7bbcSBenjamin Marzinski if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1710a63b7bbcSBenjamin Marzinski goto out_gunlock; 1711a63b7bbcSBenjamin Marzinski 1712a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1713a63b7bbcSBenjamin Marzinski if (error) 1714a63b7bbcSBenjamin Marzinski goto out_gunlock; 1715a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1716a63b7bbcSBenjamin Marzinski if (error) 1717a63b7bbcSBenjamin Marzinski goto out_gunlock; 1718a63b7bbcSBenjamin Marzinski 1719a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 17204609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, odentry->d_inode, 1721549c7297SChristian Brauner MAY_WRITE); 1722a63b7bbcSBenjamin Marzinski if (error) 1723a63b7bbcSBenjamin Marzinski goto out_gunlock; 1724a63b7bbcSBenjamin Marzinski } 1725a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 17264609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, ndentry->d_inode, 1727549c7297SChristian Brauner MAY_WRITE); 1728a63b7bbcSBenjamin Marzinski if (error) 1729a63b7bbcSBenjamin Marzinski goto out_gunlock; 1730a63b7bbcSBenjamin Marzinski } 1731a63b7bbcSBenjamin Marzinski error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1732a63b7bbcSBenjamin Marzinski if (error) 1733a63b7bbcSBenjamin Marzinski goto out_gunlock; 1734a63b7bbcSBenjamin Marzinski 1735a63b7bbcSBenjamin Marzinski error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1736a63b7bbcSBenjamin Marzinski if (error) 1737a63b7bbcSBenjamin Marzinski goto out_end_trans; 1738a63b7bbcSBenjamin Marzinski 1739a63b7bbcSBenjamin Marzinski error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1740a63b7bbcSBenjamin Marzinski if (error) 1741a63b7bbcSBenjamin Marzinski goto out_end_trans; 1742a63b7bbcSBenjamin Marzinski 1743a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1744a63b7bbcSBenjamin Marzinski IF2DT(old_mode)); 1745a63b7bbcSBenjamin Marzinski if (error) 1746a63b7bbcSBenjamin Marzinski goto out_end_trans; 1747a63b7bbcSBenjamin Marzinski 1748a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1749a63b7bbcSBenjamin Marzinski IF2DT(new_mode)); 1750a63b7bbcSBenjamin Marzinski if (error) 1751a63b7bbcSBenjamin Marzinski goto out_end_trans; 1752a63b7bbcSBenjamin Marzinski 1753a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1754a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1755a63b7bbcSBenjamin Marzinski inc_nlink(&odip->i_inode); 1756a63b7bbcSBenjamin Marzinski drop_nlink(&ndip->i_inode); 1757a63b7bbcSBenjamin Marzinski } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1758a63b7bbcSBenjamin Marzinski inc_nlink(&ndip->i_inode); 1759a63b7bbcSBenjamin Marzinski drop_nlink(&odip->i_inode); 1760a63b7bbcSBenjamin Marzinski } 1761a63b7bbcSBenjamin Marzinski } 1762a63b7bbcSBenjamin Marzinski mark_inode_dirty(&ndip->i_inode); 1763a63b7bbcSBenjamin Marzinski if (odip != ndip) 1764a63b7bbcSBenjamin Marzinski mark_inode_dirty(&odip->i_inode); 1765a63b7bbcSBenjamin Marzinski 1766a63b7bbcSBenjamin Marzinski out_end_trans: 1767a63b7bbcSBenjamin Marzinski gfs2_trans_end(sdp); 1768a63b7bbcSBenjamin Marzinski out_gunlock: 1769a63b7bbcSBenjamin Marzinski while (x--) { 1770ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 1771a63b7bbcSBenjamin Marzinski gfs2_glock_dq(ghs + x); 1772a63b7bbcSBenjamin Marzinski gfs2_holder_uninit(ghs + x); 1773a63b7bbcSBenjamin Marzinski } 1774a63b7bbcSBenjamin Marzinski out_gunlock_r: 17756df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 1776a63b7bbcSBenjamin Marzinski gfs2_glock_dq_uninit(&r_gh); 1777a63b7bbcSBenjamin Marzinski out: 1778a63b7bbcSBenjamin Marzinski return error; 1779a63b7bbcSBenjamin Marzinski } 1780a63b7bbcSBenjamin Marzinski 1781e18275aeSChristian Brauner static int gfs2_rename2(struct mnt_idmap *idmap, struct inode *odir, 1782549c7297SChristian Brauner struct dentry *odentry, struct inode *ndir, 1783549c7297SChristian Brauner struct dentry *ndentry, unsigned int flags) 1784a63b7bbcSBenjamin Marzinski { 1785a63b7bbcSBenjamin Marzinski flags &= ~RENAME_NOREPLACE; 1786a63b7bbcSBenjamin Marzinski 1787a63b7bbcSBenjamin Marzinski if (flags & ~RENAME_EXCHANGE) 1788a63b7bbcSBenjamin Marzinski return -EINVAL; 1789a63b7bbcSBenjamin Marzinski 1790a63b7bbcSBenjamin Marzinski if (flags & RENAME_EXCHANGE) 1791a63b7bbcSBenjamin Marzinski return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1792a63b7bbcSBenjamin Marzinski 1793a63b7bbcSBenjamin Marzinski return gfs2_rename(odir, odentry, ndir, ndentry); 1794a63b7bbcSBenjamin Marzinski } 1795a63b7bbcSBenjamin Marzinski 1796a63b7bbcSBenjamin Marzinski /** 17976b255391SAl Viro * gfs2_get_link - Follow a symbolic link 17982ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 17996b255391SAl Viro * @inode: The inode of the link 1800fceef393SAl Viro * @done: destructor for return value 18012ab9cd1cSSteven Whitehouse * 18022ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 18032ab9cd1cSSteven Whitehouse * 18042ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 18052ab9cd1cSSteven Whitehouse */ 18062ab9cd1cSSteven Whitehouse 18076b255391SAl Viro static const char *gfs2_get_link(struct dentry *dentry, 1808fceef393SAl Viro struct inode *inode, 1809fceef393SAl Viro struct delayed_call *done) 18102ab9cd1cSSteven Whitehouse { 18116b255391SAl Viro struct gfs2_inode *ip = GFS2_I(inode); 18122ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18132ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1814160b4026SSteven Whitehouse unsigned int size; 18152ab9cd1cSSteven Whitehouse char *buf; 18162ab9cd1cSSteven Whitehouse int error; 18172ab9cd1cSSteven Whitehouse 18186b255391SAl Viro if (!dentry) 18196b255391SAl Viro return ERR_PTR(-ECHILD); 18206b255391SAl Viro 18212ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 18222ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 18232ab9cd1cSSteven Whitehouse if (error) { 18242ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 1825680baacbSAl Viro return ERR_PTR(error); 18262ab9cd1cSSteven Whitehouse } 18272ab9cd1cSSteven Whitehouse 18282ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 18292ab9cd1cSSteven Whitehouse if (size == 0) { 18302ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 18312ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 18322ab9cd1cSSteven Whitehouse goto out; 18332ab9cd1cSSteven Whitehouse } 18342ab9cd1cSSteven Whitehouse 18352ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 18362ab9cd1cSSteven Whitehouse if (error) { 18372ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 18382ab9cd1cSSteven Whitehouse goto out; 18392ab9cd1cSSteven Whitehouse } 18402ab9cd1cSSteven Whitehouse 1841160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 18422ab9cd1cSSteven Whitehouse if (!buf) 18432ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 18442ab9cd1cSSteven Whitehouse else 1845160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 18462ab9cd1cSSteven Whitehouse brelse(dibh); 18472ab9cd1cSSteven Whitehouse out: 18482ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 1849680baacbSAl Viro if (!IS_ERR(buf)) 1850fceef393SAl Viro set_delayed_call(done, kfree_link, buf); 1851680baacbSAl Viro return buf; 18522ab9cd1cSSteven Whitehouse } 18532ab9cd1cSSteven Whitehouse 18542ab9cd1cSSteven Whitehouse /** 1855c551f66cSLee Jones * gfs2_permission 18564609e1f1SChristian Brauner * @idmap: idmap of the mount the inode was found from 18572ab9cd1cSSteven Whitehouse * @inode: The inode 18582ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 18592ab9cd1cSSteven Whitehouse * 18602ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18612ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18622ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 18632ab9cd1cSSteven Whitehouse * 18642ab9cd1cSSteven Whitehouse * Returns: errno 18652ab9cd1cSSteven Whitehouse */ 18662ab9cd1cSSteven Whitehouse 18674609e1f1SChristian Brauner int gfs2_permission(struct mnt_idmap *idmap, struct inode *inode, 1868549c7297SChristian Brauner int mask) 18692ab9cd1cSSteven Whitehouse { 1870c921e1eeSAndreas Gruenbacher int may_not_block = mask & MAY_NOT_BLOCK; 18712ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 18722ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18737f9b5e97SAl Viro struct gfs2_glock *gl; 18742ab9cd1cSSteven Whitehouse int error; 18752ab9cd1cSSteven Whitehouse 18766df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 18772ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 1878c921e1eeSAndreas Gruenbacher gl = rcu_dereference_check(ip->i_gl, !may_not_block); 18797f9b5e97SAl Viro if (unlikely(!gl)) { 18807f9b5e97SAl Viro /* inode is getting torn down, must be RCU mode */ 1881c921e1eeSAndreas Gruenbacher WARN_ON_ONCE(!may_not_block); 18827f9b5e97SAl Viro return -ECHILD; 18837f9b5e97SAl Viro } 18847f9b5e97SAl Viro if (gfs2_glock_is_locked_by_me(gl) == NULL) { 1885c921e1eeSAndreas Gruenbacher if (may_not_block) 18862ab9cd1cSSteven Whitehouse return -ECHILD; 18877f9b5e97SAl Viro error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 18882ab9cd1cSSteven Whitehouse if (error) 18892ab9cd1cSSteven Whitehouse return error; 18902ab9cd1cSSteven Whitehouse } 18912ab9cd1cSSteven Whitehouse 18922ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1893337684a1SEryu Guan error = -EPERM; 18942ab9cd1cSSteven Whitehouse else 18954609e1f1SChristian Brauner error = generic_permission(&nop_mnt_idmap, inode, mask); 18966df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 18972ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 18982ab9cd1cSSteven Whitehouse 18992ab9cd1cSSteven Whitehouse return error; 19002ab9cd1cSSteven Whitehouse } 19012ab9cd1cSSteven Whitehouse 1902ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 19032ab9cd1cSSteven Whitehouse { 1904c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, attr); 19052ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 19062ab9cd1cSSteven Whitehouse return 0; 19072ab9cd1cSSteven Whitehouse } 19082ab9cd1cSSteven Whitehouse 1909a4122a95SAndreas Gruenbacher static int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 19102ab9cd1cSSteven Whitehouse { 19112ab9cd1cSSteven Whitehouse int error; 19122ab9cd1cSSteven Whitehouse 19132ab9cd1cSSteven Whitehouse if (current->journal_info) 1914ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 19152ab9cd1cSSteven Whitehouse 1916ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 19172ab9cd1cSSteven Whitehouse if (error) 19182ab9cd1cSSteven Whitehouse return error; 19192ab9cd1cSSteven Whitehouse 1920ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1921ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 19222ab9cd1cSSteven Whitehouse return error; 19232ab9cd1cSSteven Whitehouse } 19242ab9cd1cSSteven Whitehouse 19252ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 19262ab9cd1cSSteven Whitehouse { 19272ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19282ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 19297c06b5d6SEric W. Biederman kuid_t ouid, nuid; 19307c06b5d6SEric W. Biederman kgid_t ogid, ngid; 19312ab9cd1cSSteven Whitehouse int error; 1932b8fbf471SAbhi Das struct gfs2_alloc_parms ap; 19332ab9cd1cSSteven Whitehouse 19342ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 19352ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 19362ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 19372ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 19382ab9cd1cSSteven Whitehouse 19396b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1940f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 19416b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1942f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 19432fba46a0SBob Peterson error = gfs2_qa_get(ip); 194462e96cf8SBob Peterson if (error) 19452fba46a0SBob Peterson return error; 194662e96cf8SBob Peterson 194762e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 194862e96cf8SBob Peterson if (error) 194962e96cf8SBob Peterson goto out; 195062e96cf8SBob Peterson 195162e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 195262e96cf8SBob Peterson if (error) 195362e96cf8SBob Peterson goto out; 195462e96cf8SBob Peterson 1955b8fbf471SAbhi Das ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1956b8fbf471SAbhi Das 19576b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19586b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1959b8fbf471SAbhi Das error = gfs2_quota_check(ip, nuid, ngid, &ap); 19602ab9cd1cSSteven Whitehouse if (error) 19612ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19622ab9cd1cSSteven Whitehouse } 19632ab9cd1cSSteven Whitehouse 19642ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 19652ab9cd1cSSteven Whitehouse if (error) 19662ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19672ab9cd1cSSteven Whitehouse 1968ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 19692ab9cd1cSSteven Whitehouse if (error) 19702ab9cd1cSSteven Whitehouse goto out_end_trans; 19712ab9cd1cSSteven Whitehouse 19726b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19736b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 197439a72580SAbhi Das gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1975b8fbf471SAbhi Das gfs2_quota_change(ip, ap.target, nuid, ngid); 19762ab9cd1cSSteven Whitehouse } 19772ab9cd1cSSteven Whitehouse 19782ab9cd1cSSteven Whitehouse out_end_trans: 19792ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 19802ab9cd1cSSteven Whitehouse out_gunlock_q: 19812ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 198262e96cf8SBob Peterson out: 19832fba46a0SBob Peterson gfs2_qa_put(ip); 19842ab9cd1cSSteven Whitehouse return error; 19852ab9cd1cSSteven Whitehouse } 19862ab9cd1cSSteven Whitehouse 19872ab9cd1cSSteven Whitehouse /** 19882ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 1989c1632a0fSChristian Brauner * @idmap: idmap of the mount the inode was found from 19902ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 19912ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 19922ab9cd1cSSteven Whitehouse * 19932ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 19942ab9cd1cSSteven Whitehouse * that change out to disk. 19952ab9cd1cSSteven Whitehouse * 19962ab9cd1cSSteven Whitehouse * Returns: errno 19972ab9cd1cSSteven Whitehouse */ 19982ab9cd1cSSteven Whitehouse 1999c1632a0fSChristian Brauner static int gfs2_setattr(struct mnt_idmap *idmap, 2000549c7297SChristian Brauner struct dentry *dentry, struct iattr *attr) 20012ab9cd1cSSteven Whitehouse { 20022b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 20032ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20042ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 20052ab9cd1cSSteven Whitehouse int error; 20062ab9cd1cSSteven Whitehouse 20072fba46a0SBob Peterson error = gfs2_qa_get(ip); 20080a305e49SBob Peterson if (error) 20090a305e49SBob Peterson return error; 20100a305e49SBob Peterson 20112ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 20122ab9cd1cSSteven Whitehouse if (error) 20132fba46a0SBob Peterson goto out; 20142ab9cd1cSSteven Whitehouse 20154609e1f1SChristian Brauner error = may_setattr(&nop_mnt_idmap, inode, attr->ia_valid); 2016d75b9fa0SAndreas Gruenbacher if (error) 20172fba46a0SBob Peterson goto error; 20182ab9cd1cSSteven Whitehouse 2019c1632a0fSChristian Brauner error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 20202ab9cd1cSSteven Whitehouse if (error) 20212fba46a0SBob Peterson goto error; 20222ab9cd1cSSteven Whitehouse 20232ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 20242ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 20252ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 20262ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 2027e01580bfSChristoph Hellwig else { 2028ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 2029e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 203013e83a49SChristian Brauner error = posix_acl_chmod(&nop_mnt_idmap, dentry, 2031e65ce2a5SChristian Brauner inode->i_mode); 2032e01580bfSChristoph Hellwig } 20332ab9cd1cSSteven Whitehouse 20342fba46a0SBob Peterson error: 20352ab9cd1cSSteven Whitehouse if (!error) 20362ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 2037ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 20382fba46a0SBob Peterson out: 20392fba46a0SBob Peterson gfs2_qa_put(ip); 20402ab9cd1cSSteven Whitehouse return error; 20412ab9cd1cSSteven Whitehouse } 20422ab9cd1cSSteven Whitehouse 20432ab9cd1cSSteven Whitehouse /** 20442ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 2045b74d24f7SChristian Brauner * @idmap: idmap of the mount the inode was found from 2046a528d35eSDavid Howells * @path: Object to query 20472ab9cd1cSSteven Whitehouse * @stat: The inode's stats 2048a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 2049a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 20502ab9cd1cSSteven Whitehouse * 20512ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 20522ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 20532ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 20542ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 20552ab9cd1cSSteven Whitehouse * with the glock already held. 20562ab9cd1cSSteven Whitehouse * 20572ab9cd1cSSteven Whitehouse * Returns: errno 20582ab9cd1cSSteven Whitehouse */ 20592ab9cd1cSSteven Whitehouse 2060b74d24f7SChristian Brauner static int gfs2_getattr(struct mnt_idmap *idmap, 2061549c7297SChristian Brauner const struct path *path, struct kstat *stat, 2062a528d35eSDavid Howells u32 request_mask, unsigned int flags) 20632ab9cd1cSSteven Whitehouse { 2064a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 20652ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20662ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 2067b2623c2fSAndreas Gruenbacher u32 gfsflags; 20682ab9cd1cSSteven Whitehouse int error; 20692ab9cd1cSSteven Whitehouse 20706df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 20712ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 20722ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 20732ab9cd1cSSteven Whitehouse if (error) 20742ab9cd1cSSteven Whitehouse return error; 20752ab9cd1cSSteven Whitehouse } 20762ab9cd1cSSteven Whitehouse 2077b2623c2fSAndreas Gruenbacher gfsflags = ip->i_diskflags; 2078b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_APPENDONLY) 2079b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_APPEND; 2080b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_IMMUTABLE) 2081b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_IMMUTABLE; 2082b2623c2fSAndreas Gruenbacher 2083b2623c2fSAndreas Gruenbacher stat->attributes_mask |= (STATX_ATTR_APPEND | 2084b2623c2fSAndreas Gruenbacher STATX_ATTR_COMPRESSED | 2085b2623c2fSAndreas Gruenbacher STATX_ATTR_ENCRYPTED | 2086b2623c2fSAndreas Gruenbacher STATX_ATTR_IMMUTABLE | 2087b2623c2fSAndreas Gruenbacher STATX_ATTR_NODUMP); 2088b2623c2fSAndreas Gruenbacher 20890d72b928SJeff Layton generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 2090b2623c2fSAndreas Gruenbacher 20916df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 20922ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 20932ab9cd1cSSteven Whitehouse 20942ab9cd1cSSteven Whitehouse return 0; 20952ab9cd1cSSteven Whitehouse } 20962ab9cd1cSSteven Whitehouse 20972ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 20982ab9cd1cSSteven Whitehouse u64 start, u64 len) 20992ab9cd1cSSteven Whitehouse { 21002ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 21012ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 21022ab9cd1cSSteven Whitehouse int ret; 21032ab9cd1cSSteven Whitehouse 2104aac1a55bSBob Peterson inode_lock_shared(inode); 21052ab9cd1cSSteven Whitehouse 21062ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21072ab9cd1cSSteven Whitehouse if (ret) 21082ab9cd1cSSteven Whitehouse goto out; 21092ab9cd1cSSteven Whitehouse 2110aac1a55bSBob Peterson ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 21112ab9cd1cSSteven Whitehouse 21122ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 2113aac1a55bSBob Peterson 21142ab9cd1cSSteven Whitehouse out: 2115aac1a55bSBob Peterson inode_unlock_shared(inode); 21162ab9cd1cSSteven Whitehouse return ret; 21172ab9cd1cSSteven Whitehouse } 21182ab9cd1cSSteven Whitehouse 21193a27411cSAndreas Gruenbacher loff_t gfs2_seek_data(struct file *file, loff_t offset) 21203a27411cSAndreas Gruenbacher { 21213a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21223a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21233a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21243a27411cSAndreas Gruenbacher loff_t ret; 21253a27411cSAndreas Gruenbacher 21263a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21273a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21283a27411cSAndreas Gruenbacher if (!ret) 21293a27411cSAndreas Gruenbacher ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 21303a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21313a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21323a27411cSAndreas Gruenbacher 21333a27411cSAndreas Gruenbacher if (ret < 0) 21343a27411cSAndreas Gruenbacher return ret; 21353a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21363a27411cSAndreas Gruenbacher } 21373a27411cSAndreas Gruenbacher 21383a27411cSAndreas Gruenbacher loff_t gfs2_seek_hole(struct file *file, loff_t offset) 21393a27411cSAndreas Gruenbacher { 21403a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21413a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21423a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21433a27411cSAndreas Gruenbacher loff_t ret; 21443a27411cSAndreas Gruenbacher 21453a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21463a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21473a27411cSAndreas Gruenbacher if (!ret) 21483a27411cSAndreas Gruenbacher ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 21493a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21503a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21513a27411cSAndreas Gruenbacher 21523a27411cSAndreas Gruenbacher if (ret < 0) 21533a27411cSAndreas Gruenbacher return ret; 21543a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21553a27411cSAndreas Gruenbacher } 21563a27411cSAndreas Gruenbacher 2157913e9928SJeff Layton static int gfs2_update_time(struct inode *inode, int flags) 215882e938bdSAndreas Gruenbacher { 215982e938bdSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 216082e938bdSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_gl; 216182e938bdSAndreas Gruenbacher struct gfs2_holder *gh; 216282e938bdSAndreas Gruenbacher int error; 216382e938bdSAndreas Gruenbacher 216482e938bdSAndreas Gruenbacher gh = gfs2_glock_is_locked_by_me(gl); 216582e938bdSAndreas Gruenbacher if (gh && !gfs2_glock_is_held_excl(gl)) { 216682e938bdSAndreas Gruenbacher gfs2_glock_dq(gh); 216782e938bdSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); 216882e938bdSAndreas Gruenbacher error = gfs2_glock_nq(gh); 216982e938bdSAndreas Gruenbacher if (error) 217082e938bdSAndreas Gruenbacher return error; 217182e938bdSAndreas Gruenbacher } 2172541d4c79SJeff Layton generic_update_time(inode, flags); 2173541d4c79SJeff Layton return 0; 217482e938bdSAndreas Gruenbacher } 217582e938bdSAndreas Gruenbacher 2176e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops = { 21772ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21782ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21792ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21802ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21812ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2182cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2183e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 218482e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 218588b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 218688b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21872ab9cd1cSSteven Whitehouse }; 21882ab9cd1cSSteven Whitehouse 2189e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops = { 21902ab9cd1cSSteven Whitehouse .create = gfs2_create, 21912ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 21922ab9cd1cSSteven Whitehouse .link = gfs2_link, 21932ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 21942ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 21952ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 21962ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 21972ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 21982773bf00SMiklos Szeredi .rename = gfs2_rename2, 21992ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 22002ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 22012ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 22022ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 22032ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2204cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2205e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 220682e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 22076d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 220888b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 220988b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 22102ab9cd1cSSteven Whitehouse }; 22112ab9cd1cSSteven Whitehouse 2212e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops = { 22136b255391SAl Viro .get_link = gfs2_get_link, 22142ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 22152ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 22162ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 22172ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 22182ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 22192ab9cd1cSSteven Whitehouse }; 22202ab9cd1cSSteven Whitehouse 2221