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 2682ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2692ab9cd1cSSteven Whitehouse { 2702ab9cd1cSSteven Whitehouse struct qstr qstr; 2712ab9cd1cSSteven Whitehouse struct inode *inode; 2722ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2732ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2742ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2752ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2762ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2772ab9cd1cSSteven Whitehouse * and do not check for NULL. 2782ab9cd1cSSteven Whitehouse */ 2792ab9cd1cSSteven Whitehouse if (inode == NULL) 2802ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2812ab9cd1cSSteven Whitehouse else 2822ab9cd1cSSteven Whitehouse return inode; 2832ab9cd1cSSteven Whitehouse } 2842ab9cd1cSSteven Whitehouse 2852ab9cd1cSSteven Whitehouse 2862ab9cd1cSSteven Whitehouse /** 2872ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 288c551f66cSLee Jones * @dir: The inode of the directory containing the inode to look-up 2892ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2902ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2912ab9cd1cSSteven Whitehouse * 2922ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2932ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2942ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2952ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2962ab9cd1cSSteven Whitehouse * 2972ab9cd1cSSteven Whitehouse * Returns: errno 2982ab9cd1cSSteven Whitehouse */ 2992ab9cd1cSSteven Whitehouse 3002ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 3012ab9cd1cSSteven Whitehouse int is_root) 3022ab9cd1cSSteven Whitehouse { 3032ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 3042ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 3052ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 3062ab9cd1cSSteven Whitehouse int error = 0; 3072ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 3082ab9cd1cSSteven Whitehouse 3096df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&d_gh); 3102ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 3112ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 3122ab9cd1cSSteven Whitehouse 3132ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 3142ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 3152b0143b5SDavid Howells dir == d_inode(sb->s_root))) { 3162ab9cd1cSSteven Whitehouse igrab(dir); 3172ab9cd1cSSteven Whitehouse return dir; 3182ab9cd1cSSteven Whitehouse } 3192ab9cd1cSSteven Whitehouse 3202ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3212ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3222ab9cd1cSSteven Whitehouse if (error) 3232ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3242ab9cd1cSSteven Whitehouse } 3252ab9cd1cSSteven Whitehouse 3262ab9cd1cSSteven Whitehouse if (!is_root) { 3274609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, dir, MAY_EXEC); 3282ab9cd1cSSteven Whitehouse if (error) 3292ab9cd1cSSteven Whitehouse goto out; 3302ab9cd1cSSteven Whitehouse } 3312ab9cd1cSSteven Whitehouse 3325a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3332ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3342ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3352ab9cd1cSSteven Whitehouse out: 3366df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&d_gh)) 3372ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3382ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3392ab9cd1cSSteven Whitehouse return NULL; 3402ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3412ab9cd1cSSteven Whitehouse } 3422ab9cd1cSSteven Whitehouse 3432ab9cd1cSSteven Whitehouse /** 3442ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3452ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3462ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3472ab9cd1cSSteven Whitehouse * @mode: 3482ab9cd1cSSteven Whitehouse * 3492ab9cd1cSSteven Whitehouse * Returns: errno 3502ab9cd1cSSteven Whitehouse */ 3512ab9cd1cSSteven Whitehouse 3522ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 353175a4eb7SAl Viro umode_t mode) 3542ab9cd1cSSteven Whitehouse { 3552ab9cd1cSSteven Whitehouse int error; 3562ab9cd1cSSteven Whitehouse 3574609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode, 358549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 3592ab9cd1cSSteven Whitehouse if (error) 3602ab9cd1cSSteven Whitehouse return error; 3612ab9cd1cSSteven Whitehouse 3622ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3632ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3642ab9cd1cSSteven Whitehouse return -ENOENT; 3652ab9cd1cSSteven Whitehouse 3662ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3672ab9cd1cSSteven Whitehouse return -EFBIG; 3682ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3692ab9cd1cSSteven Whitehouse return -EMLINK; 3702ab9cd1cSSteven Whitehouse 3712ab9cd1cSSteven Whitehouse return 0; 3722ab9cd1cSSteven Whitehouse } 3732ab9cd1cSSteven Whitehouse 374c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 375c9aecf73SSteven Whitehouse struct inode *inode) 3762ab9cd1cSSteven Whitehouse { 3772ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3786b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3796b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 380c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 381c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3826b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 383c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 384c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3852ab9cd1cSSteven Whitehouse } else 386c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3872ab9cd1cSSteven Whitehouse 3882ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 389c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 390c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 391c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3922ab9cd1cSSteven Whitehouse } else 393c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3942ab9cd1cSSteven Whitehouse } 3952ab9cd1cSSteven Whitehouse 396b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 3972ab9cd1cSSteven Whitehouse { 398c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 399b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 4002ab9cd1cSSteven Whitehouse int error; 4012ab9cd1cSSteven Whitehouse 402b8fbf471SAbhi Das error = gfs2_quota_lock_check(ip, &ap); 4032ab9cd1cSSteven Whitehouse if (error) 4042ab9cd1cSSteven Whitehouse goto out; 4052ab9cd1cSSteven Whitehouse 4067b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 407fd4b4e04SSteven Whitehouse if (error) 408fd4b4e04SSteven Whitehouse goto out_quota; 409fd4b4e04SSteven Whitehouse 410b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 4112ab9cd1cSSteven Whitehouse if (error) 4122ab9cd1cSSteven Whitehouse goto out_ipreserv; 4132ab9cd1cSSteven Whitehouse 414b2c8b3eaSSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 41535c23fbaSAndreas Gruenbacher if (error) 41635c23fbaSAndreas Gruenbacher goto out_trans_end; 41735c23fbaSAndreas Gruenbacher 418c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 419c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 420c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 42138552ff6SAndreas Gruenbacher if (*dblocks > 1) 42238552ff6SAndreas Gruenbacher ip->i_eattr = ip->i_no_addr + 1; 4232ab9cd1cSSteven Whitehouse 42435c23fbaSAndreas Gruenbacher out_trans_end: 4252ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4262ab9cd1cSSteven Whitehouse out_ipreserv: 427c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 428fd4b4e04SSteven Whitehouse out_quota: 429fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4302ab9cd1cSSteven Whitehouse out: 4312ab9cd1cSSteven Whitehouse return error; 4322ab9cd1cSSteven Whitehouse } 4332ab9cd1cSSteven Whitehouse 434f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 435f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 436e2d0a13bSSteven Whitehouse { 437e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 438e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 439e2d0a13bSSteven Whitehouse 440e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 441e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 442e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 443e2d0a13bSSteven Whitehouse 444e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 445e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 446e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 447e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 448e2d0a13bSSteven Whitehouse 449e2d0a13bSSteven Whitehouse } 450e2d0a13bSSteven Whitehouse 4512ab9cd1cSSteven Whitehouse /** 452b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 453b2c8b3eaSSteven Whitehouse * @ip: The inode in question 454b2c8b3eaSSteven Whitehouse * 455b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 456b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 457b2c8b3eaSSteven Whitehouse */ 458b2c8b3eaSSteven Whitehouse 459b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 460b2c8b3eaSSteven Whitehouse { 461b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 462b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 463b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 464b2c8b3eaSSteven Whitehouse 465b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 466b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 467b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 468b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 469b2c8b3eaSSteven Whitehouse 470b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 471b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 472b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 473b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 474b2c8b3eaSSteven Whitehouse 475b2c8b3eaSSteven Whitehouse brelse(bh); 476b2c8b3eaSSteven Whitehouse } 477b2c8b3eaSSteven Whitehouse 478b2c8b3eaSSteven Whitehouse /** 4792ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 480f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 481c9aecf73SSteven Whitehouse * @ip: The inode 482f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 4832ab9cd1cSSteven Whitehouse * 4842ab9cd1cSSteven Whitehouse */ 4852ab9cd1cSSteven Whitehouse 486c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 48779ba7480SSteven Whitehouse const char *symname) 4882ab9cd1cSSteven Whitehouse { 4892ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4902ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4912ab9cd1cSSteven Whitehouse 492c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 493350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4942ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 49579ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4962ab9cd1cSSteven Whitehouse 4976f24784fSAl Viro di->di_major = cpu_to_be32(imajor(&ip->i_inode)); 4986f24784fSAl Viro di->di_minor = cpu_to_be32(iminor(&ip->i_inode)); 4992ab9cd1cSSteven Whitehouse di->__pad1 = 0; 5002ab9cd1cSSteven Whitehouse di->__pad2 = 0; 5012ab9cd1cSSteven Whitehouse di->__pad3 = 0; 5022ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 5032ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 50479ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 5052ab9cd1cSSteven Whitehouse 506c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 507160b4026SSteven Whitehouse case S_IFDIR: 508e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 509160b4026SSteven Whitehouse break; 510160b4026SSteven Whitehouse case S_IFLNK: 511c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 512160b4026SSteven Whitehouse break; 513e2d0a13bSSteven Whitehouse } 514e2d0a13bSSteven Whitehouse 5152ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 51679ba7480SSteven Whitehouse brelse(dibh); 5172ab9cd1cSSteven Whitehouse } 5182ab9cd1cSSteven Whitehouse 519534cf9caSSteven Whitehouse /** 520c551f66cSLee Jones * gfs2_trans_da_blks - Calculate number of blocks to link inode 521534cf9caSSteven Whitehouse * @dip: The directory we are linking into 522534cf9caSSteven Whitehouse * @da: The dir add information 523534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 524534cf9caSSteven Whitehouse * 525534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 526534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 527534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 528534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 529534cf9caSSteven Whitehouse * 530534cf9caSSteven Whitehouse * Returns: Number of blocks 531534cf9caSSteven Whitehouse */ 532534cf9caSSteven Whitehouse 533534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 534534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 535534cf9caSSteven Whitehouse unsigned nr_inodes) 536534cf9caSSteven Whitehouse { 537534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 538534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 539534cf9caSSteven Whitehouse } 540534cf9caSSteven Whitehouse 5412ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5423c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5432ab9cd1cSSteven Whitehouse { 5442ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5453c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5462ab9cd1cSSteven Whitehouse int error; 5472ab9cd1cSSteven Whitehouse 5483c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 549b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 5502ab9cd1cSSteven Whitehouse if (error) 5512ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5522ab9cd1cSSteven Whitehouse 5537b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5542ab9cd1cSSteven Whitehouse if (error) 5552ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5562ab9cd1cSSteven Whitehouse 557534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5582ab9cd1cSSteven Whitehouse if (error) 5592ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5602ab9cd1cSSteven Whitehouse } else { 5612ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5622ab9cd1cSSteven Whitehouse if (error) 5632ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5642ab9cd1cSSteven Whitehouse } 5652ab9cd1cSSteven Whitehouse 5662b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5672ab9cd1cSSteven Whitehouse 5682ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5692ab9cd1cSSteven Whitehouse fail_ipreserv: 5702ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5712ab9cd1cSSteven Whitehouse fail_quota_locks: 5722ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5732ab9cd1cSSteven Whitehouse return error; 5742ab9cd1cSSteven Whitehouse } 5752ab9cd1cSSteven Whitehouse 57646cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5779d8f13baSMimi Zohar void *fs_info) 5782ab9cd1cSSteven Whitehouse { 5799d8f13baSMimi Zohar const struct xattr *xattr; 5809d8f13baSMimi Zohar int err = 0; 5812ab9cd1cSSteven Whitehouse 5829d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5839d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5849d8f13baSMimi Zohar xattr->value_len, 0, 5859d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5869d8f13baSMimi Zohar if (err < 0) 5879d8f13baSMimi Zohar break; 5889d8f13baSMimi Zohar } 5892ab9cd1cSSteven Whitehouse return err; 5902ab9cd1cSSteven Whitehouse } 5912ab9cd1cSSteven Whitehouse 5922ab9cd1cSSteven Whitehouse /** 593f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 594f2741d98SSteven Whitehouse * @dir: The parent directory 595f2741d98SSteven Whitehouse * @dentry: The new dentry 5966d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 597f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 598f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 599f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 600f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 601c551f66cSLee Jones * @excl: Force fail if inode exists 6022ab9cd1cSSteven Whitehouse * 60338552ff6SAndreas Gruenbacher * FIXME: Change to allocate the disk blocks and write them out in the same 60438552ff6SAndreas Gruenbacher * transaction. That way, we can no longer end up in a situation in which an 60538552ff6SAndreas Gruenbacher * inode is allocated, the node crashes, and the block looks like a valid 60638552ff6SAndreas Gruenbacher * inode. (With atomic creates in place, we will also no longer need to zero 60738552ff6SAndreas Gruenbacher * the link count and dirty the inode here on failure.) 60838552ff6SAndreas Gruenbacher * 609f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 6102ab9cd1cSSteven Whitehouse */ 6112ab9cd1cSSteven Whitehouse 612f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 6136d4ade98SSteven Whitehouse struct file *file, 614175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 615b452a458SAl Viro unsigned int size, int excl) 6162ab9cd1cSSteven Whitehouse { 617f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 618e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 619761fdbbcSAndreas Gruenbacher struct gfs2_holder d_gh, gh; 6202ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 6218e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 6222ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 623a55a47a3SAndreas Gruenbacher struct gfs2_glock *io_gl; 62438552ff6SAndreas Gruenbacher int error; 6259dbe9610SSteven Whitehouse u32 aflags = 0; 626b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 62719aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 6282ab9cd1cSSteven Whitehouse 6292ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 630f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6312ab9cd1cSSteven Whitehouse 6322fba46a0SBob Peterson error = gfs2_qa_get(dip); 6330a305e49SBob Peterson if (error) 6340a305e49SBob Peterson return error; 6350a305e49SBob Peterson 636fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 637fd4b4e04SSteven Whitehouse if (error) 6382fba46a0SBob Peterson goto fail; 639fd4b4e04SSteven Whitehouse 640761fdbbcSAndreas Gruenbacher error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); 6412ab9cd1cSSteven Whitehouse if (error) 6422ab9cd1cSSteven Whitehouse goto fail; 643761fdbbcSAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 6442ab9cd1cSSteven Whitehouse 6452ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6462ab9cd1cSSteven Whitehouse if (error) 6472ab9cd1cSSteven Whitehouse goto fail_gunlock; 6482ab9cd1cSSteven Whitehouse 6495a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6505a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6515a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 652571a4b57SAl Viro if (S_ISDIR(inode->i_mode)) { 653571a4b57SAl Viro iput(inode); 654571a4b57SAl Viro inode = ERR_PTR(-EISDIR); 655571a4b57SAl Viro goto fail_gunlock; 656571a4b57SAl Viro } 65744bb31baSAl Viro d_instantiate(dentry, inode); 6586d4ade98SSteven Whitehouse error = 0; 6590d0d1107SMiklos Szeredi if (file) { 66044bb31baSAl Viro if (S_ISREG(inode->i_mode)) 661be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 66244bb31baSAl Viro else 66344bb31baSAl Viro error = finish_no_open(file, NULL); 6645ca1db41SMiklos Szeredi } 665761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 6662297ab61SBob Peterson goto fail; 6675a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6685a00f3ccSSteven Whitehouse goto fail_gunlock; 6695a00f3ccSSteven Whitehouse } 6705a00f3ccSSteven Whitehouse 6713c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 672fd4b4e04SSteven Whitehouse if (error < 0) 673fd4b4e04SSteven Whitehouse goto fail_gunlock; 674fd4b4e04SSteven Whitehouse 675c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 676fd4b4e04SSteven Whitehouse error = -ENOMEM; 677fd4b4e04SSteven Whitehouse if (!inode) 678fd4b4e04SSteven Whitehouse goto fail_gunlock; 6793d0258bcSAndreas Gruenbacher ip = GFS2_I(inode); 680fd4b4e04SSteven Whitehouse 681e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 682e01580bfSChristoph Hellwig if (error) 683783013c0SBob Peterson goto fail_gunlock; 684e01580bfSChristoph Hellwig 6852fba46a0SBob Peterson error = gfs2_qa_get(ip); 686ff7f4cb4SSteven Whitehouse if (error) 687e01580bfSChristoph Hellwig goto fail_free_acls; 688c9aecf73SSteven Whitehouse 689c9aecf73SSteven Whitehouse inode->i_mode = mode; 69079ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 691c9aecf73SSteven Whitehouse inode->i_rdev = dev; 692c9aecf73SSteven Whitehouse inode->i_size = size; 693078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 694c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 69500a158beSAbhi Das check_and_update_goal(dip); 696c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 69728fb3027SSteven Whitehouse ip->i_diskflags = 0; 69828fb3027SSteven Whitehouse ip->i_eattr = 0; 69928fb3027SSteven Whitehouse ip->i_height = 0; 70028fb3027SSteven Whitehouse ip->i_depth = 0; 70128fb3027SSteven Whitehouse ip->i_entries = 0; 702cc963a11SBob Peterson ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 70328fb3027SSteven Whitehouse 70428fb3027SSteven Whitehouse switch(mode & S_IFMT) { 70528fb3027SSteven Whitehouse case S_IFREG: 70628fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 70728fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 70828fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 70928fb3027SSteven Whitehouse gfs2_set_aops(inode); 71028fb3027SSteven Whitehouse break; 71128fb3027SSteven Whitehouse case S_IFDIR: 71228fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 71328fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 71428fb3027SSteven Whitehouse ip->i_entries = 2; 71528fb3027SSteven Whitehouse break; 71628fb3027SSteven Whitehouse } 717acc546fdSAbhi Das 718acc546fdSAbhi Das /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 719acc546fdSAbhi Das if (dip->i_diskflags & GFS2_DIF_SYSTEM) 720acc546fdSAbhi Das ip->i_diskflags |= GFS2_DIF_SYSTEM; 721acc546fdSAbhi Das 72228fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 723c9aecf73SSteven Whitehouse 7242b0143b5SDavid Howells if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 7259dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7269dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7279dbe9610SSteven Whitehouse 728b2c8b3eaSSteven Whitehouse if (default_acl || acl) 729b2c8b3eaSSteven Whitehouse blocks++; 730b2c8b3eaSSteven Whitehouse 731b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 732c9aecf73SSteven Whitehouse if (error) 733c9aecf73SSteven Whitehouse goto fail_free_inode; 734c9aecf73SSteven Whitehouse 735b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 736b2c8b3eaSSteven Whitehouse 737c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 738c9aecf73SSteven Whitehouse if (error) 739c9aecf73SSteven Whitehouse goto fail_free_inode; 74098e5a91aSAndreas Gruenbacher 741dd0ecf54SAndreas Gruenbacher error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 742c9aecf73SSteven Whitehouse if (error) 743c9aecf73SSteven Whitehouse goto fail_free_inode; 744dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 745dd0ecf54SAndreas Gruenbacher 7464ec3c19dSAndreas Gruenbacher retry: 7473d36e57fSAndreas Gruenbacher error = insert_inode_locked4(inode, ip->i_no_addr, iget_test, &ip->i_no_addr); 7484ec3c19dSAndreas Gruenbacher if (error == -EBUSY) 7494ec3c19dSAndreas Gruenbacher goto retry; 7504ec3c19dSAndreas Gruenbacher if (error) 7514ec3c19dSAndreas Gruenbacher goto fail_gunlock2; 7523d36e57fSAndreas Gruenbacher 753ebdc416cSAndreas Gruenbacher error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT | GL_NOPID, 754ebdc416cSAndreas Gruenbacher &ip->i_iopen_gh); 755dd0ecf54SAndreas Gruenbacher if (error) 756dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 757c9aecf73SSteven Whitehouse 758761fdbbcSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); 75929464ee3SAndreas Gruenbacher if (error) 76029464ee3SAndreas Gruenbacher goto fail_gunlock3; 76129464ee3SAndreas Gruenbacher 762b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 763c9aecf73SSteven Whitehouse if (error) 76429464ee3SAndreas Gruenbacher goto fail_gunlock3; 7650a305e49SBob Peterson 76638552ff6SAndreas Gruenbacher if (blocks > 1) 767b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 76879ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 769fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 770fd4b4e04SSteven Whitehouse 7713d36e57fSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 7728793e149SBob Peterson glock_set_object(io_gl, ip); 773c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 774c9aecf73SSteven Whitehouse 775e01580bfSChristoph Hellwig if (default_acl) { 7761a39ba99SAl Viro error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 7772ab9cd1cSSteven Whitehouse if (error) 77829464ee3SAndreas Gruenbacher goto fail_gunlock4; 7796ff9b09eSAndreas Gruenbacher posix_acl_release(default_acl); 7806ff9b09eSAndreas Gruenbacher default_acl = NULL; 7816ff9b09eSAndreas Gruenbacher } 7826ff9b09eSAndreas Gruenbacher if (acl) { 7836ff9b09eSAndreas Gruenbacher error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 7846ff9b09eSAndreas Gruenbacher if (error) 78529464ee3SAndreas Gruenbacher goto fail_gunlock4; 7866ff9b09eSAndreas Gruenbacher posix_acl_release(acl); 7876ff9b09eSAndreas Gruenbacher acl = NULL; 7886ff9b09eSAndreas Gruenbacher } 7892ab9cd1cSSteven Whitehouse 790f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 791f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7922ab9cd1cSSteven Whitehouse if (error) 79329464ee3SAndreas Gruenbacher goto fail_gunlock4; 7942ab9cd1cSSteven Whitehouse 7953c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 7962ab9cd1cSSteven Whitehouse if (error) 79729464ee3SAndreas Gruenbacher goto fail_gunlock4; 7982ab9cd1cSSteven Whitehouse 79979ba7480SSteven Whitehouse mark_inode_dirty(inode); 8006d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 8012c47c1beSBob Peterson /* After instantiate, errors should result in evict which will destroy 8022c47c1beSBob Peterson * both inode and iopen glocks properly. */ 803c5bf8fefSMiklos Szeredi if (file) { 80473a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 805be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 806c5bf8fefSMiklos Szeredi } 807761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 8082297ab61SBob Peterson gfs2_qa_put(ip); 809761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 8102c47c1beSBob Peterson gfs2_glock_put(io_gl); 8112297ab61SBob Peterson gfs2_qa_put(dip); 8123d36e57fSAndreas Gruenbacher unlock_new_inode(inode); 8136d4ade98SSteven Whitehouse return error; 8142ab9cd1cSSteven Whitehouse 81529464ee3SAndreas Gruenbacher fail_gunlock4: 8163d36e57fSAndreas Gruenbacher glock_clear_object(ip->i_gl, ip); 8179c1b2808SBob Peterson glock_clear_object(io_gl, ip); 81829464ee3SAndreas Gruenbacher fail_gunlock3: 819783013c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 8202ab9cd1cSSteven Whitehouse fail_gunlock2: 8212c47c1beSBob Peterson gfs2_glock_put(io_gl); 822c9aecf73SSteven Whitehouse fail_free_inode: 8239ffa1888SAndreas Gruenbacher if (ip->i_gl) { 8249ffa1888SAndreas Gruenbacher gfs2_glock_put(ip->i_gl); 8259ffa1888SAndreas Gruenbacher ip->i_gl = NULL; 8269ffa1888SAndreas Gruenbacher } 8277336905aSAndreas Gruenbacher gfs2_rs_deltree(&ip->i_res); 8281595548fSAndreas Gruenbacher gfs2_qa_put(ip); 829e01580bfSChristoph Hellwig fail_free_acls: 830e01580bfSChristoph Hellwig posix_acl_release(default_acl); 831e01580bfSChristoph Hellwig posix_acl_release(acl); 8322ab9cd1cSSteven Whitehouse fail_gunlock: 8332b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 834761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 83515a798f7SKefeng Wang if (!IS_ERR_OR_NULL(inode)) { 83638552ff6SAndreas Gruenbacher set_bit(GIF_ALLOC_FAILED, &ip->i_flags); 83779ba7480SSteven Whitehouse clear_nlink(inode); 83838552ff6SAndreas Gruenbacher if (ip->i_no_addr) 83979ba7480SSteven Whitehouse mark_inode_dirty(inode); 8403d36e57fSAndreas Gruenbacher if (inode->i_state & I_NEW) 8413d36e57fSAndreas Gruenbacher iget_failed(inode); 8423d36e57fSAndreas Gruenbacher else 84340ac218fSSteven Whitehouse iput(inode); 84440ac218fSSteven Whitehouse } 845761fdbbcSAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 846761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 8472ab9cd1cSSteven Whitehouse fail: 8482fba46a0SBob Peterson gfs2_qa_put(dip); 849f2741d98SSteven Whitehouse return error; 8502ab9cd1cSSteven Whitehouse } 851f2741d98SSteven Whitehouse 8522ab9cd1cSSteven Whitehouse /** 8532ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 8546c960e68SChristian Brauner * @idmap: idmap of the mount the inode was found from 8552ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8562ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8572ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 858c551f66cSLee Jones * @excl: Force fail if inode exists 8592ab9cd1cSSteven Whitehouse * 8602ab9cd1cSSteven Whitehouse * Returns: errno 8612ab9cd1cSSteven Whitehouse */ 8622ab9cd1cSSteven Whitehouse 8636c960e68SChristian Brauner static int gfs2_create(struct mnt_idmap *idmap, struct inode *dir, 864549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 8652ab9cd1cSSteven Whitehouse { 866b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 8672ab9cd1cSSteven Whitehouse } 8682ab9cd1cSSteven Whitehouse 8692ab9cd1cSSteven Whitehouse /** 8706d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8712ab9cd1cSSteven Whitehouse * @dir: The directory inode 8722ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8736d4ade98SSteven Whitehouse * @file: File to be opened 8742ab9cd1cSSteven Whitehouse * 8752ab9cd1cSSteven Whitehouse * 8762ab9cd1cSSteven Whitehouse * Returns: errno 8772ab9cd1cSSteven Whitehouse */ 8782ab9cd1cSSteven Whitehouse 8796d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 880b452a458SAl Viro struct file *file) 8812ab9cd1cSSteven Whitehouse { 8826d4ade98SSteven Whitehouse struct inode *inode; 8836d4ade98SSteven Whitehouse struct dentry *d; 8842ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8856d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8862ab9cd1cSSteven Whitehouse int error; 8876d4ade98SSteven Whitehouse 8886d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8897b7a9115SBenjamin Coddington if (inode == NULL) { 8907b7a9115SBenjamin Coddington d_add(dentry, NULL); 8916d4ade98SSteven Whitehouse return NULL; 8927b7a9115SBenjamin Coddington } 8936d4ade98SSteven Whitehouse if (IS_ERR(inode)) 8946d4ade98SSteven Whitehouse return ERR_CAST(inode); 8956d4ade98SSteven Whitehouse 8966d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 8972ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8982ab9cd1cSSteven Whitehouse if (error) { 8992ab9cd1cSSteven Whitehouse iput(inode); 9002ab9cd1cSSteven Whitehouse return ERR_PTR(error); 9012ab9cd1cSSteven Whitehouse } 9026d4ade98SSteven Whitehouse 9036d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 904d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 905d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 906d57b9c9aSJ. Bruce Fields return d; 907d57b9c9aSJ. Bruce Fields } 9086d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 909be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 9106d4ade98SSteven Whitehouse 9112ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 9125ca1db41SMiklos Szeredi if (error) { 9135ca1db41SMiklos Szeredi dput(d); 9146d4ade98SSteven Whitehouse return ERR_PTR(error); 9155ca1db41SMiklos Szeredi } 9166d4ade98SSteven Whitehouse return d; 9172ab9cd1cSSteven Whitehouse } 9186d4ade98SSteven Whitehouse 9196d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 9206d4ade98SSteven Whitehouse unsigned flags) 9216d4ade98SSteven Whitehouse { 922b452a458SAl Viro return __gfs2_lookup(dir, dentry, NULL); 9232ab9cd1cSSteven Whitehouse } 9242ab9cd1cSSteven Whitehouse 9252ab9cd1cSSteven Whitehouse /** 9262ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 9272ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 9282ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 9292ab9cd1cSSteven Whitehouse * @dentry: The name of the link 9302ab9cd1cSSteven Whitehouse * 9312ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 9322ab9cd1cSSteven Whitehouse * name in "dentry". 9332ab9cd1cSSteven Whitehouse * 9342ab9cd1cSSteven Whitehouse * Returns: errno 9352ab9cd1cSSteven Whitehouse */ 9362ab9cd1cSSteven Whitehouse 9372ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 9382ab9cd1cSSteven Whitehouse struct dentry *dentry) 9392ab9cd1cSSteven Whitehouse { 9402ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9412ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9422b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 9432ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 944*2d084780SAndrew Price struct gfs2_holder d_gh, gh; 9452ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 94619aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 9472ab9cd1cSSteven Whitehouse int error; 9482ab9cd1cSSteven Whitehouse 9492ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9502ab9cd1cSSteven Whitehouse return -EPERM; 9512ab9cd1cSSteven Whitehouse 9522fba46a0SBob Peterson error = gfs2_qa_get(dip); 9530a305e49SBob Peterson if (error) 9540a305e49SBob Peterson return error; 9550a305e49SBob Peterson 956*2d084780SAndrew Price gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); 957*2d084780SAndrew Price gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 9582ab9cd1cSSteven Whitehouse 959*2d084780SAndrew Price error = gfs2_glock_nq(&d_gh); 9602ab9cd1cSSteven Whitehouse if (error) 9612ab9cd1cSSteven Whitehouse goto out_parent; 9622ab9cd1cSSteven Whitehouse 963*2d084780SAndrew Price error = gfs2_glock_nq(&gh); 9642ab9cd1cSSteven Whitehouse if (error) 9652ab9cd1cSSteven Whitehouse goto out_child; 9662ab9cd1cSSteven Whitehouse 9672ab9cd1cSSteven Whitehouse error = -ENOENT; 9682ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9692ab9cd1cSSteven Whitehouse goto out_gunlock; 9702ab9cd1cSSteven Whitehouse 9714609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, dir, MAY_WRITE | MAY_EXEC); 9722ab9cd1cSSteven Whitehouse if (error) 9732ab9cd1cSSteven Whitehouse goto out_gunlock; 9742ab9cd1cSSteven Whitehouse 9752ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9762ab9cd1cSSteven Whitehouse switch (error) { 9772ab9cd1cSSteven Whitehouse case -ENOENT: 9782ab9cd1cSSteven Whitehouse break; 9792ab9cd1cSSteven Whitehouse case 0: 9802ab9cd1cSSteven Whitehouse error = -EEXIST; 981e5966cf2SGustavo A. R. Silva goto out_gunlock; 9822ab9cd1cSSteven Whitehouse default: 9832ab9cd1cSSteven Whitehouse goto out_gunlock; 9842ab9cd1cSSteven Whitehouse } 9852ab9cd1cSSteven Whitehouse 9862ab9cd1cSSteven Whitehouse error = -EINVAL; 9872ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9882ab9cd1cSSteven Whitehouse goto out_gunlock; 9892ab9cd1cSSteven Whitehouse error = -EFBIG; 9902ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9912ab9cd1cSSteven Whitehouse goto out_gunlock; 9922ab9cd1cSSteven Whitehouse error = -EPERM; 9932ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 9942ab9cd1cSSteven Whitehouse goto out_gunlock; 9952ab9cd1cSSteven Whitehouse error = -EMLINK; 9962ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 9972ab9cd1cSSteven Whitehouse goto out_gunlock; 9982ab9cd1cSSteven Whitehouse 9993c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 10002ab9cd1cSSteven Whitehouse if (error < 0) 10012ab9cd1cSSteven Whitehouse goto out_gunlock; 10022ab9cd1cSSteven Whitehouse 10033c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 10043c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1005b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 10062ab9cd1cSSteven Whitehouse if (error) 10075407e242SBob Peterson goto out_gunlock; 10082ab9cd1cSSteven Whitehouse 10097b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 10102ab9cd1cSSteven Whitehouse if (error) 10112ab9cd1cSSteven Whitehouse goto out_gunlock_q; 10122ab9cd1cSSteven Whitehouse 1013534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 10142ab9cd1cSSteven Whitehouse if (error) 10152ab9cd1cSSteven Whitehouse goto out_ipres; 10162ab9cd1cSSteven Whitehouse } else { 10172ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 10182ab9cd1cSSteven Whitehouse if (error) 10192ab9cd1cSSteven Whitehouse goto out_ipres; 10202ab9cd1cSSteven Whitehouse } 10212ab9cd1cSSteven Whitehouse 10222ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 10232ab9cd1cSSteven Whitehouse if (error) 10242ab9cd1cSSteven Whitehouse goto out_end_trans; 10252ab9cd1cSSteven Whitehouse 10262b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 10272ab9cd1cSSteven Whitehouse if (error) 10282ab9cd1cSSteven Whitehouse goto out_brelse; 10292ab9cd1cSSteven Whitehouse 1030350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 10312ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 1032078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 1033ab9bbda0SSteven Whitehouse ihold(inode); 1034ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 1035ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 10362ab9cd1cSSteven Whitehouse 10372ab9cd1cSSteven Whitehouse out_brelse: 10382ab9cd1cSSteven Whitehouse brelse(dibh); 10392ab9cd1cSSteven Whitehouse out_end_trans: 10402ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10412ab9cd1cSSteven Whitehouse out_ipres: 10423c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10432ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10442ab9cd1cSSteven Whitehouse out_gunlock_q: 10453c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10462ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10472ab9cd1cSSteven Whitehouse out_gunlock: 10482b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1049*2d084780SAndrew Price gfs2_glock_dq(&gh); 10502ab9cd1cSSteven Whitehouse out_child: 1051*2d084780SAndrew Price gfs2_glock_dq(&d_gh); 10522ab9cd1cSSteven Whitehouse out_parent: 10532297ab61SBob Peterson gfs2_qa_put(dip); 1054*2d084780SAndrew Price gfs2_holder_uninit(&d_gh); 1055*2d084780SAndrew Price gfs2_holder_uninit(&gh); 10562ab9cd1cSSteven Whitehouse return error; 10572ab9cd1cSSteven Whitehouse } 10582ab9cd1cSSteven Whitehouse 10592ab9cd1cSSteven Whitehouse /* 10602ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10612ab9cd1cSSteven Whitehouse * @dip: the directory 10622ab9cd1cSSteven Whitehouse * @name: the name of the file 10632ab9cd1cSSteven Whitehouse * @ip: the inode 10642ab9cd1cSSteven Whitehouse * 10652ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10662ab9cd1cSSteven Whitehouse * 10672ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10682ab9cd1cSSteven Whitehouse */ 10692ab9cd1cSSteven Whitehouse 10702ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10712ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10722ab9cd1cSSteven Whitehouse { 10732ab9cd1cSSteven Whitehouse int error; 10742ab9cd1cSSteven Whitehouse 10752ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10762ab9cd1cSSteven Whitehouse return -EPERM; 10772ab9cd1cSSteven Whitehouse 10782ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10796b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10806b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10812ab9cd1cSSteven Whitehouse return -EPERM; 10822ab9cd1cSSteven Whitehouse 10832ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10842ab9cd1cSSteven Whitehouse return -EPERM; 10852ab9cd1cSSteven Whitehouse 10864609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode, 1087549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 10882ab9cd1cSSteven Whitehouse if (error) 10892ab9cd1cSSteven Whitehouse return error; 10902ab9cd1cSSteven Whitehouse 109137975f15SFabian Frederick return gfs2_dir_check(&dip->i_inode, name, ip); 10922ab9cd1cSSteven Whitehouse } 10932ab9cd1cSSteven Whitehouse 10942ab9cd1cSSteven Whitehouse /** 10952ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10962ab9cd1cSSteven Whitehouse * @dip: The parent directory 1097c551f66cSLee Jones * @dentry: The dentry to unlink 10982ab9cd1cSSteven Whitehouse * 10992ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 11002ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 11012ab9cd1cSSteven Whitehouse * 11022ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 11032ab9cd1cSSteven Whitehouse */ 11042ab9cd1cSSteven Whitehouse 11052ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 11064327a9bfSBob Peterson const struct dentry *dentry) 11072ab9cd1cSSteven Whitehouse { 11082b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11092ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11102ab9cd1cSSteven Whitehouse int error; 11112ab9cd1cSSteven Whitehouse 11122ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 11132ab9cd1cSSteven Whitehouse if (error) 11142ab9cd1cSSteven Whitehouse return error; 11152ab9cd1cSSteven Whitehouse 11162ab9cd1cSSteven Whitehouse ip->i_entries = 0; 1117078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 11182ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 11192ab9cd1cSSteven Whitehouse clear_nlink(inode); 11202ab9cd1cSSteven Whitehouse else 11212ab9cd1cSSteven Whitehouse drop_nlink(inode); 11222ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 11232ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11242ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 11252ab9cd1cSSteven Whitehouse return 0; 11262ab9cd1cSSteven Whitehouse } 11272ab9cd1cSSteven Whitehouse 11282ab9cd1cSSteven Whitehouse 11292ab9cd1cSSteven Whitehouse /** 11302ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 11312ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 11322ab9cd1cSSteven Whitehouse * @dentry: The file itself 11332ab9cd1cSSteven Whitehouse * 11342ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 11352ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 11362ab9cd1cSSteven Whitehouse * 11372ab9cd1cSSteven Whitehouse * Returns: errno 11382ab9cd1cSSteven Whitehouse */ 11392ab9cd1cSSteven Whitehouse 11402ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11412ab9cd1cSSteven Whitehouse { 11422ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11432ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11442b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11452ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11462ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 11472ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11485e2f7d61SBob Peterson int error; 11495e2f7d61SBob Peterson 11505e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11515e2f7d61SBob Peterson if (error) 11525e2f7d61SBob Peterson return error; 11535e2f7d61SBob Peterson 11545e2f7d61SBob Peterson error = -EROFS; 11552ab9cd1cSSteven Whitehouse 11562ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 11572ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 11582ab9cd1cSSteven Whitehouse 115966fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1160a365fbf3SSteven Whitehouse if (!rgd) 116187654896SSteven Whitehouse goto out_inodes; 1162a365fbf3SSteven Whitehouse 11634fc7ec31SBob Peterson gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2); 11642ab9cd1cSSteven Whitehouse 11652ab9cd1cSSteven Whitehouse 11662ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 11672ab9cd1cSSteven Whitehouse if (error) 11682ab9cd1cSSteven Whitehouse goto out_parent; 11692ab9cd1cSSteven Whitehouse 11702ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 11712ab9cd1cSSteven Whitehouse if (error) 11722ab9cd1cSSteven Whitehouse goto out_child; 11732ab9cd1cSSteven Whitehouse 11742ab9cd1cSSteven Whitehouse error = -ENOENT; 11752ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11762ab9cd1cSSteven Whitehouse goto out_rgrp; 11772ab9cd1cSSteven Whitehouse 11782ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11792ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11802ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11812ab9cd1cSSteven Whitehouse goto out_rgrp; 11822ab9cd1cSSteven Whitehouse } 11832ab9cd1cSSteven Whitehouse 11842ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 11852ab9cd1cSSteven Whitehouse if (error) 11862ab9cd1cSSteven Whitehouse goto out_rgrp; 11872ab9cd1cSSteven Whitehouse 11882ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11892ab9cd1cSSteven Whitehouse if (error) 11902ab9cd1cSSteven Whitehouse goto out_gunlock; 11912ab9cd1cSSteven Whitehouse 11922ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 11932ab9cd1cSSteven Whitehouse if (error) 11942eb5909dSBob Peterson goto out_gunlock; 11952ab9cd1cSSteven Whitehouse 11964327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 11972ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11982eb5909dSBob Peterson 11992ab9cd1cSSteven Whitehouse out_gunlock: 12002ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 12012ab9cd1cSSteven Whitehouse out_rgrp: 12022ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 12032ab9cd1cSSteven Whitehouse out_child: 12042ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 12052ab9cd1cSSteven Whitehouse out_parent: 120687654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 120787654896SSteven Whitehouse out_inodes: 120887654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 12092ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 12102ab9cd1cSSteven Whitehouse return error; 12112ab9cd1cSSteven Whitehouse } 12122ab9cd1cSSteven Whitehouse 12132ab9cd1cSSteven Whitehouse /** 12142ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 12157a77db95SChristian Brauner * @idmap: idmap of the mount the inode was found from 12162ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 12172ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 12182ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 12192ab9cd1cSSteven Whitehouse * 12202ab9cd1cSSteven Whitehouse * Returns: errno 12212ab9cd1cSSteven Whitehouse */ 12222ab9cd1cSSteven Whitehouse 12237a77db95SChristian Brauner static int gfs2_symlink(struct mnt_idmap *idmap, struct inode *dir, 1224549c7297SChristian Brauner struct dentry *dentry, const char *symname) 12252ab9cd1cSSteven Whitehouse { 1226160b4026SSteven Whitehouse unsigned int size; 12272ab9cd1cSSteven Whitehouse 12282ab9cd1cSSteven Whitehouse size = strlen(symname); 1229235628c5SAndreas Gruenbacher if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 12302ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 12312ab9cd1cSSteven Whitehouse 1232b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 12332ab9cd1cSSteven Whitehouse } 12342ab9cd1cSSteven Whitehouse 12352ab9cd1cSSteven Whitehouse /** 12362ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 1237c54bd91eSChristian Brauner * @idmap: idmap of the mount the inode was found from 12382ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12392ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12402ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12412ab9cd1cSSteven Whitehouse * 12422ab9cd1cSSteven Whitehouse * Returns: errno 12432ab9cd1cSSteven Whitehouse */ 12442ab9cd1cSSteven Whitehouse 1245c54bd91eSChristian Brauner static int gfs2_mkdir(struct mnt_idmap *idmap, struct inode *dir, 1246549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 12472ab9cd1cSSteven Whitehouse { 1248235628c5SAndreas Gruenbacher unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1249b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 12502ab9cd1cSSteven Whitehouse } 12512ab9cd1cSSteven Whitehouse 12522ab9cd1cSSteven Whitehouse /** 12532ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 12545ebb29beSChristian Brauner * @idmap: idmap of the mount the inode was found from 12552ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12562ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12572ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1258f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12592ab9cd1cSSteven Whitehouse * 12602ab9cd1cSSteven Whitehouse */ 12612ab9cd1cSSteven Whitehouse 12625ebb29beSChristian Brauner static int gfs2_mknod(struct mnt_idmap *idmap, struct inode *dir, 1263549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t dev) 12642ab9cd1cSSteven Whitehouse { 1265b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 12666d4ade98SSteven Whitehouse } 12676d4ade98SSteven Whitehouse 12686d4ade98SSteven Whitehouse /** 12696d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12706d4ade98SSteven Whitehouse * @dir: The directory 12716d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12726d4ade98SSteven Whitehouse * @file: The proposed new struct file 12736d4ade98SSteven Whitehouse * @flags: open flags 12746d4ade98SSteven Whitehouse * @mode: File mode 12756d4ade98SSteven Whitehouse * 12766d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12776d4ade98SSteven Whitehouse */ 12786d4ade98SSteven Whitehouse 12796d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12806d4ade98SSteven Whitehouse struct file *file, unsigned flags, 128144907d79SAl Viro umode_t mode) 12826d4ade98SSteven Whitehouse { 12836d4ade98SSteven Whitehouse struct dentry *d; 12846d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12856d4ade98SSteven Whitehouse 128600699ad8SAl Viro if (!d_in_lookup(dentry)) 12874d93bc3eSAl Viro goto skip_lookup; 12884d93bc3eSAl Viro 1289b452a458SAl Viro d = __gfs2_lookup(dir, dentry, file); 12906d4ade98SSteven Whitehouse if (IS_ERR(d)) 12916d4ade98SSteven Whitehouse return PTR_ERR(d); 12925ca1db41SMiklos Szeredi if (d != NULL) 12935ca1db41SMiklos Szeredi dentry = d; 12942b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1295aad888f8SAl Viro if (!(file->f_mode & FMODE_OPENED)) 1296ec7d879cSAl Viro return finish_no_open(file, d); 12975ca1db41SMiklos Szeredi dput(d); 129821039132SAl Viro return excl && (flags & O_CREAT) ? -EEXIST : 0; 12996d4ade98SSteven Whitehouse } 13006d4ade98SSteven Whitehouse 13015ca1db41SMiklos Szeredi BUG_ON(d != NULL); 13024d93bc3eSAl Viro 13034d93bc3eSAl Viro skip_lookup: 13046d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 13056d4ade98SSteven Whitehouse return -ENOENT; 13066d4ade98SSteven Whitehouse 1307b452a458SAl Viro return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 13082ab9cd1cSSteven Whitehouse } 13092ab9cd1cSSteven Whitehouse 13102ab9cd1cSSteven Whitehouse /* 13112ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 13122ab9cd1cSSteven Whitehouse * @this: move this 13132ab9cd1cSSteven Whitehouse * @to: to here 13142ab9cd1cSSteven Whitehouse * 13152ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 13162ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 13172ab9cd1cSSteven Whitehouse * 13182ab9cd1cSSteven Whitehouse * Returns: errno 13192ab9cd1cSSteven Whitehouse */ 13202ab9cd1cSSteven Whitehouse 13212ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 13222ab9cd1cSSteven Whitehouse { 13232ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 13242ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 13252ab9cd1cSSteven Whitehouse struct inode *tmp; 13262ab9cd1cSSteven Whitehouse int error = 0; 13272ab9cd1cSSteven Whitehouse 13282ab9cd1cSSteven Whitehouse igrab(dir); 13292ab9cd1cSSteven Whitehouse 13302ab9cd1cSSteven Whitehouse for (;;) { 13312ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 13322ab9cd1cSSteven Whitehouse error = -EINVAL; 13332ab9cd1cSSteven Whitehouse break; 13342ab9cd1cSSteven Whitehouse } 13352b0143b5SDavid Howells if (dir == d_inode(sb->s_root)) { 13362ab9cd1cSSteven Whitehouse error = 0; 13372ab9cd1cSSteven Whitehouse break; 13382ab9cd1cSSteven Whitehouse } 13392ab9cd1cSSteven Whitehouse 13402ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 134148f8f711SAbhi Das if (!tmp) { 134248f8f711SAbhi Das error = -ENOENT; 134348f8f711SAbhi Das break; 134448f8f711SAbhi Das } 13452ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13462ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13472ab9cd1cSSteven Whitehouse break; 13482ab9cd1cSSteven Whitehouse } 13492ab9cd1cSSteven Whitehouse 13502ab9cd1cSSteven Whitehouse iput(dir); 13512ab9cd1cSSteven Whitehouse dir = tmp; 13522ab9cd1cSSteven Whitehouse } 13532ab9cd1cSSteven Whitehouse 13542ab9cd1cSSteven Whitehouse iput(dir); 13552ab9cd1cSSteven Whitehouse 13562ab9cd1cSSteven Whitehouse return error; 13572ab9cd1cSSteven Whitehouse } 13582ab9cd1cSSteven Whitehouse 13592ab9cd1cSSteven Whitehouse /** 1360a63b7bbcSBenjamin Marzinski * update_moved_ino - Update an inode that's being moved 1361a63b7bbcSBenjamin Marzinski * @ip: The inode being moved 1362a63b7bbcSBenjamin Marzinski * @ndip: The parent directory of the new filename 1363a63b7bbcSBenjamin Marzinski * @dir_rename: True of ip is a directory 1364a63b7bbcSBenjamin Marzinski * 1365a63b7bbcSBenjamin Marzinski * Returns: errno 1366a63b7bbcSBenjamin Marzinski */ 1367a63b7bbcSBenjamin Marzinski 1368a63b7bbcSBenjamin Marzinski static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1369a63b7bbcSBenjamin Marzinski int dir_rename) 1370a63b7bbcSBenjamin Marzinski { 1371a63b7bbcSBenjamin Marzinski if (dir_rename) 1372a63b7bbcSBenjamin Marzinski return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1373a63b7bbcSBenjamin Marzinski 1374078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 137583998ccdSAndreas Gruenbacher mark_inode_dirty_sync(&ip->i_inode); 1376a63b7bbcSBenjamin Marzinski return 0; 1377a63b7bbcSBenjamin Marzinski } 1378a63b7bbcSBenjamin Marzinski 1379a63b7bbcSBenjamin Marzinski 1380a63b7bbcSBenjamin Marzinski /** 13812ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13822ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13832ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13842ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13852ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13862ab9cd1cSSteven Whitehouse * 13872ab9cd1cSSteven Whitehouse * Returns: errno 13882ab9cd1cSSteven Whitehouse */ 13892ab9cd1cSSteven Whitehouse 13902ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13912ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13922ab9cd1cSSteven Whitehouse { 13932ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 13942ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 13952b0143b5SDavid Howells struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 13962ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 13972ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 1398bc74aaefSBob Peterson struct gfs2_holder ghs[4], r_gh, rd_gh; 13992ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 14002ab9cd1cSSteven Whitehouse unsigned int num_gh; 14012ab9cd1cSSteven Whitehouse int dir_rename = 0; 140219aeb5a6SBob Peterson struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 14032ab9cd1cSSteven Whitehouse unsigned int x; 14042ab9cd1cSSteven Whitehouse int error; 14052ab9cd1cSSteven Whitehouse 14066df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1407bc74aaefSBob Peterson gfs2_holder_mark_uninitialized(&rd_gh); 14082b0143b5SDavid Howells if (d_really_is_positive(ndentry)) { 14092b0143b5SDavid Howells nip = GFS2_I(d_inode(ndentry)); 14102ab9cd1cSSteven Whitehouse if (ip == nip) 14112ab9cd1cSSteven Whitehouse return 0; 14122ab9cd1cSSteven Whitehouse } 14132ab9cd1cSSteven Whitehouse 14145e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 14155e2f7d61SBob Peterson if (error) 14165e2f7d61SBob Peterson return error; 14175e2f7d61SBob Peterson 14182fba46a0SBob Peterson error = gfs2_qa_get(ndip); 14190a305e49SBob Peterson if (error) 14200a305e49SBob Peterson return error; 14210a305e49SBob Peterson 14222ab9cd1cSSteven Whitehouse if (odip != ndip) { 14232ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 14242ab9cd1cSSteven Whitehouse 0, &r_gh); 14252ab9cd1cSSteven Whitehouse if (error) 14262ab9cd1cSSteven Whitehouse goto out; 14272ab9cd1cSSteven Whitehouse 14282ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 14292ab9cd1cSSteven Whitehouse dir_rename = 1; 1430a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 14312ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 14322ab9cd1cSSteven Whitehouse if (error) 14332ab9cd1cSSteven Whitehouse goto out_gunlock_r; 14342ab9cd1cSSteven Whitehouse } 14352ab9cd1cSSteven Whitehouse } 14362ab9cd1cSSteven Whitehouse 14372ab9cd1cSSteven Whitehouse num_gh = 1; 1438ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 14392ab9cd1cSSteven Whitehouse if (odip != ndip) { 1440ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1441ad26967bSBob Peterson ghs + num_gh); 14422ab9cd1cSSteven Whitehouse num_gh++; 14432ab9cd1cSSteven Whitehouse } 1444ad26967bSBob Peterson gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 14452ab9cd1cSSteven Whitehouse num_gh++; 14462ab9cd1cSSteven Whitehouse 14472ab9cd1cSSteven Whitehouse if (nip) { 1448ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1449ad26967bSBob Peterson ghs + num_gh); 14502ab9cd1cSSteven Whitehouse num_gh++; 14512ab9cd1cSSteven Whitehouse } 14522ab9cd1cSSteven Whitehouse 14532ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 14542ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 14552ab9cd1cSSteven Whitehouse if (error) 14562ab9cd1cSSteven Whitehouse goto out_gunlock; 14572ab9cd1cSSteven Whitehouse } 1458ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1459ad26967bSBob Peterson if (error) 1460ad26967bSBob Peterson goto out_gunlock; 14612ab9cd1cSSteven Whitehouse 1462bc74aaefSBob Peterson if (nip) { 1463bc74aaefSBob Peterson /* Grab the resource group glock for unlink flag twiddling. 1464bc74aaefSBob Peterson * This is the case where the target dinode already exists 1465bc74aaefSBob Peterson * so we unlink before doing the rename. 1466bc74aaefSBob Peterson */ 1467bc74aaefSBob Peterson nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1468bc74aaefSBob Peterson if (!nrgd) { 1469bc74aaefSBob Peterson error = -ENOENT; 1470bc74aaefSBob Peterson goto out_gunlock; 1471bc74aaefSBob Peterson } 14724fc7ec31SBob Peterson error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 14734fc7ec31SBob Peterson LM_FLAG_NODE_SCOPE, &rd_gh); 1474bc74aaefSBob Peterson if (error) 1475bc74aaefSBob Peterson goto out_gunlock; 1476bc74aaefSBob Peterson } 1477bc74aaefSBob Peterson 14782ab9cd1cSSteven Whitehouse error = -ENOENT; 14792ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14802ab9cd1cSSteven Whitehouse goto out_gunlock; 14812ab9cd1cSSteven Whitehouse 14822ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14832ab9cd1cSSteven Whitehouse 14842ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14852ab9cd1cSSteven Whitehouse if (error) 14862ab9cd1cSSteven Whitehouse goto out_gunlock; 14872ab9cd1cSSteven Whitehouse 14882ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14892ab9cd1cSSteven Whitehouse 14902ab9cd1cSSteven Whitehouse if (nip) { 14912ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14922ab9cd1cSSteven Whitehouse if (error) 14932ab9cd1cSSteven Whitehouse goto out_gunlock; 14942ab9cd1cSSteven Whitehouse 14952ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 14962ab9cd1cSSteven Whitehouse error = -EAGAIN; 14972ab9cd1cSSteven Whitehouse goto out_gunlock; 14982ab9cd1cSSteven Whitehouse } 14992ab9cd1cSSteven Whitehouse 15002ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 15012ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 15022ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 15032ab9cd1cSSteven Whitehouse error = -EIO; 15042ab9cd1cSSteven Whitehouse goto out_gunlock; 15052ab9cd1cSSteven Whitehouse } 15062ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 15072ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 15082ab9cd1cSSteven Whitehouse goto out_gunlock; 15092ab9cd1cSSteven Whitehouse } 15102ab9cd1cSSteven Whitehouse } 15112ab9cd1cSSteven Whitehouse } else { 15124609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, ndir, 1513549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 15142ab9cd1cSSteven Whitehouse if (error) 15152ab9cd1cSSteven Whitehouse goto out_gunlock; 15162ab9cd1cSSteven Whitehouse 15172ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 15182ab9cd1cSSteven Whitehouse switch (error) { 15192ab9cd1cSSteven Whitehouse case -ENOENT: 15202ab9cd1cSSteven Whitehouse error = 0; 15212ab9cd1cSSteven Whitehouse break; 15222ab9cd1cSSteven Whitehouse case 0: 15232ab9cd1cSSteven Whitehouse error = -EEXIST; 1524e5966cf2SGustavo A. R. Silva goto out_gunlock; 15252ab9cd1cSSteven Whitehouse default: 15262ab9cd1cSSteven Whitehouse goto out_gunlock; 1527098b9c14SAliasgar Surti } 15282ab9cd1cSSteven Whitehouse 15292ab9cd1cSSteven Whitehouse if (odip != ndip) { 15302ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 15312ab9cd1cSSteven Whitehouse error = -ENOENT; 15322ab9cd1cSSteven Whitehouse goto out_gunlock; 15332ab9cd1cSSteven Whitehouse } 15342ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 15352ab9cd1cSSteven Whitehouse error = -EFBIG; 15362ab9cd1cSSteven Whitehouse goto out_gunlock; 15372ab9cd1cSSteven Whitehouse } 15382ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 15392ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 15402ab9cd1cSSteven Whitehouse error = -EMLINK; 15412ab9cd1cSSteven Whitehouse goto out_gunlock; 15422ab9cd1cSSteven Whitehouse } 15432ab9cd1cSSteven Whitehouse } 15442ab9cd1cSSteven Whitehouse } 15452ab9cd1cSSteven Whitehouse 15462ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 15472ab9cd1cSSteven Whitehouse 15482ab9cd1cSSteven Whitehouse if (dir_rename) { 15494609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, d_inode(odentry), 1550549c7297SChristian Brauner MAY_WRITE); 15512ab9cd1cSSteven Whitehouse if (error) 15522ab9cd1cSSteven Whitehouse goto out_gunlock; 15532ab9cd1cSSteven Whitehouse } 15542ab9cd1cSSteven Whitehouse 15553c1c0ae1SSteven Whitehouse if (nip == NULL) { 15563c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 15573c1c0ae1SSteven Whitehouse if (error) 15582ab9cd1cSSteven Whitehouse goto out_gunlock; 15593c1c0ae1SSteven Whitehouse } 15602ab9cd1cSSteven Whitehouse 15613c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 15623c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1563b8fbf471SAbhi Das error = gfs2_quota_lock_check(ndip, &ap); 15642ab9cd1cSSteven Whitehouse if (error) 15655407e242SBob Peterson goto out_gunlock; 15662ab9cd1cSSteven Whitehouse 15677b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 15682ab9cd1cSSteven Whitehouse if (error) 15692ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15702ab9cd1cSSteven Whitehouse 1571534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1572534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 15732ab9cd1cSSteven Whitehouse if (error) 15742ab9cd1cSSteven Whitehouse goto out_ipreserv; 15752ab9cd1cSSteven Whitehouse } else { 15762ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 15772ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 15782ab9cd1cSSteven Whitehouse if (error) 15792ab9cd1cSSteven Whitehouse goto out_gunlock; 15802ab9cd1cSSteven Whitehouse } 15812ab9cd1cSSteven Whitehouse 15822ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15832ab9cd1cSSteven Whitehouse 15844327a9bfSBob Peterson if (nip) 15854327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15862ab9cd1cSSteven Whitehouse 1587a63b7bbcSBenjamin Marzinski error = update_moved_ino(ip, ndip, dir_rename); 15882ab9cd1cSSteven Whitehouse if (error) 15892ab9cd1cSSteven Whitehouse goto out_end_trans; 15902ab9cd1cSSteven Whitehouse 15912ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15922ab9cd1cSSteven Whitehouse if (error) 15932ab9cd1cSSteven Whitehouse goto out_end_trans; 15942ab9cd1cSSteven Whitehouse 15952b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 15962ab9cd1cSSteven Whitehouse if (error) 15972ab9cd1cSSteven Whitehouse goto out_end_trans; 15982ab9cd1cSSteven Whitehouse 15992ab9cd1cSSteven Whitehouse out_end_trans: 16002ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 16012ab9cd1cSSteven Whitehouse out_ipreserv: 16023c1c0ae1SSteven Whitehouse if (da.nr_blocks) 16032ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 16042ab9cd1cSSteven Whitehouse out_gunlock_q: 16053c1c0ae1SSteven Whitehouse if (da.nr_blocks) 16062ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 16072ab9cd1cSSteven Whitehouse out_gunlock: 16082b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1609bc74aaefSBob Peterson if (gfs2_holder_initialized(&rd_gh)) 1610bc74aaefSBob Peterson gfs2_glock_dq_uninit(&rd_gh); 1611bc74aaefSBob Peterson 16122ab9cd1cSSteven Whitehouse while (x--) { 1613ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 16142ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 16152ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 16162ab9cd1cSSteven Whitehouse } 16172ab9cd1cSSteven Whitehouse out_gunlock_r: 16186df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 16192ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 16202ab9cd1cSSteven Whitehouse out: 16212fba46a0SBob Peterson gfs2_qa_put(ndip); 16222ab9cd1cSSteven Whitehouse return error; 16232ab9cd1cSSteven Whitehouse } 16242ab9cd1cSSteven Whitehouse 16252ab9cd1cSSteven Whitehouse /** 1626a63b7bbcSBenjamin Marzinski * gfs2_exchange - exchange two files 1627a63b7bbcSBenjamin Marzinski * @odir: Parent directory of old file name 1628a63b7bbcSBenjamin Marzinski * @odentry: The old dentry of the file 1629a63b7bbcSBenjamin Marzinski * @ndir: Parent directory of new file name 1630a63b7bbcSBenjamin Marzinski * @ndentry: The new dentry of the file 1631a63b7bbcSBenjamin Marzinski * @flags: The rename flags 1632a63b7bbcSBenjamin Marzinski * 1633a63b7bbcSBenjamin Marzinski * Returns: errno 1634a63b7bbcSBenjamin Marzinski */ 1635a63b7bbcSBenjamin Marzinski 1636a63b7bbcSBenjamin Marzinski static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1637a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1638a63b7bbcSBenjamin Marzinski unsigned int flags) 1639a63b7bbcSBenjamin Marzinski { 1640a63b7bbcSBenjamin Marzinski struct gfs2_inode *odip = GFS2_I(odir); 1641a63b7bbcSBenjamin Marzinski struct gfs2_inode *ndip = GFS2_I(ndir); 1642a63b7bbcSBenjamin Marzinski struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1643a63b7bbcSBenjamin Marzinski struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1644a63b7bbcSBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(odir); 1645ad26967bSBob Peterson struct gfs2_holder ghs[4], r_gh; 1646a63b7bbcSBenjamin Marzinski unsigned int num_gh; 1647a63b7bbcSBenjamin Marzinski unsigned int x; 1648a63b7bbcSBenjamin Marzinski umode_t old_mode = oip->i_inode.i_mode; 1649a63b7bbcSBenjamin Marzinski umode_t new_mode = nip->i_inode.i_mode; 1650a63b7bbcSBenjamin Marzinski int error; 1651a63b7bbcSBenjamin Marzinski 16526df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1653a63b7bbcSBenjamin Marzinski error = gfs2_rindex_update(sdp); 1654a63b7bbcSBenjamin Marzinski if (error) 1655a63b7bbcSBenjamin Marzinski return error; 1656a63b7bbcSBenjamin Marzinski 1657a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1658a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1659a63b7bbcSBenjamin Marzinski 0, &r_gh); 1660a63b7bbcSBenjamin Marzinski if (error) 1661a63b7bbcSBenjamin Marzinski goto out; 1662a63b7bbcSBenjamin Marzinski 1663a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1664a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1665a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(oip, ndip); 1666a63b7bbcSBenjamin Marzinski if (error) 1667a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1668a63b7bbcSBenjamin Marzinski } 1669a63b7bbcSBenjamin Marzinski 1670a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1671a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1672a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(nip, odip); 1673a63b7bbcSBenjamin Marzinski if (error) 1674a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1675a63b7bbcSBenjamin Marzinski } 1676a63b7bbcSBenjamin Marzinski } 1677a63b7bbcSBenjamin Marzinski 1678a63b7bbcSBenjamin Marzinski num_gh = 1; 1679ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1680a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1681ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1682ad26967bSBob Peterson ghs + num_gh); 1683a63b7bbcSBenjamin Marzinski num_gh++; 1684a63b7bbcSBenjamin Marzinski } 1685ad26967bSBob Peterson gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1686a63b7bbcSBenjamin Marzinski num_gh++; 1687a63b7bbcSBenjamin Marzinski 1688ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1689a63b7bbcSBenjamin Marzinski num_gh++; 1690a63b7bbcSBenjamin Marzinski 1691a63b7bbcSBenjamin Marzinski for (x = 0; x < num_gh; x++) { 1692a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq(ghs + x); 1693a63b7bbcSBenjamin Marzinski if (error) 1694a63b7bbcSBenjamin Marzinski goto out_gunlock; 1695a63b7bbcSBenjamin Marzinski } 1696a63b7bbcSBenjamin Marzinski 1697ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1698ad26967bSBob Peterson if (error) 1699ad26967bSBob Peterson goto out_gunlock; 1700ad26967bSBob Peterson 1701a63b7bbcSBenjamin Marzinski error = -ENOENT; 1702a63b7bbcSBenjamin Marzinski if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1703a63b7bbcSBenjamin Marzinski goto out_gunlock; 1704a63b7bbcSBenjamin Marzinski 1705a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1706a63b7bbcSBenjamin Marzinski if (error) 1707a63b7bbcSBenjamin Marzinski goto out_gunlock; 1708a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1709a63b7bbcSBenjamin Marzinski if (error) 1710a63b7bbcSBenjamin Marzinski goto out_gunlock; 1711a63b7bbcSBenjamin Marzinski 1712a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 17134609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, odentry->d_inode, 1714549c7297SChristian Brauner MAY_WRITE); 1715a63b7bbcSBenjamin Marzinski if (error) 1716a63b7bbcSBenjamin Marzinski goto out_gunlock; 1717a63b7bbcSBenjamin Marzinski } 1718a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 17194609e1f1SChristian Brauner error = gfs2_permission(&nop_mnt_idmap, ndentry->d_inode, 1720549c7297SChristian Brauner MAY_WRITE); 1721a63b7bbcSBenjamin Marzinski if (error) 1722a63b7bbcSBenjamin Marzinski goto out_gunlock; 1723a63b7bbcSBenjamin Marzinski } 1724a63b7bbcSBenjamin Marzinski error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1725a63b7bbcSBenjamin Marzinski if (error) 1726a63b7bbcSBenjamin Marzinski goto out_gunlock; 1727a63b7bbcSBenjamin Marzinski 1728a63b7bbcSBenjamin Marzinski error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1729a63b7bbcSBenjamin Marzinski if (error) 1730a63b7bbcSBenjamin Marzinski goto out_end_trans; 1731a63b7bbcSBenjamin Marzinski 1732a63b7bbcSBenjamin Marzinski error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1733a63b7bbcSBenjamin Marzinski if (error) 1734a63b7bbcSBenjamin Marzinski goto out_end_trans; 1735a63b7bbcSBenjamin Marzinski 1736a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1737a63b7bbcSBenjamin Marzinski IF2DT(old_mode)); 1738a63b7bbcSBenjamin Marzinski if (error) 1739a63b7bbcSBenjamin Marzinski goto out_end_trans; 1740a63b7bbcSBenjamin Marzinski 1741a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1742a63b7bbcSBenjamin Marzinski IF2DT(new_mode)); 1743a63b7bbcSBenjamin Marzinski if (error) 1744a63b7bbcSBenjamin Marzinski goto out_end_trans; 1745a63b7bbcSBenjamin Marzinski 1746a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1747a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1748a63b7bbcSBenjamin Marzinski inc_nlink(&odip->i_inode); 1749a63b7bbcSBenjamin Marzinski drop_nlink(&ndip->i_inode); 1750a63b7bbcSBenjamin Marzinski } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1751a63b7bbcSBenjamin Marzinski inc_nlink(&ndip->i_inode); 1752a63b7bbcSBenjamin Marzinski drop_nlink(&odip->i_inode); 1753a63b7bbcSBenjamin Marzinski } 1754a63b7bbcSBenjamin Marzinski } 1755a63b7bbcSBenjamin Marzinski mark_inode_dirty(&ndip->i_inode); 1756a63b7bbcSBenjamin Marzinski if (odip != ndip) 1757a63b7bbcSBenjamin Marzinski mark_inode_dirty(&odip->i_inode); 1758a63b7bbcSBenjamin Marzinski 1759a63b7bbcSBenjamin Marzinski out_end_trans: 1760a63b7bbcSBenjamin Marzinski gfs2_trans_end(sdp); 1761a63b7bbcSBenjamin Marzinski out_gunlock: 1762a63b7bbcSBenjamin Marzinski while (x--) { 1763ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 1764a63b7bbcSBenjamin Marzinski gfs2_glock_dq(ghs + x); 1765a63b7bbcSBenjamin Marzinski gfs2_holder_uninit(ghs + x); 1766a63b7bbcSBenjamin Marzinski } 1767a63b7bbcSBenjamin Marzinski out_gunlock_r: 17686df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 1769a63b7bbcSBenjamin Marzinski gfs2_glock_dq_uninit(&r_gh); 1770a63b7bbcSBenjamin Marzinski out: 1771a63b7bbcSBenjamin Marzinski return error; 1772a63b7bbcSBenjamin Marzinski } 1773a63b7bbcSBenjamin Marzinski 1774e18275aeSChristian Brauner static int gfs2_rename2(struct mnt_idmap *idmap, struct inode *odir, 1775549c7297SChristian Brauner struct dentry *odentry, struct inode *ndir, 1776549c7297SChristian Brauner struct dentry *ndentry, unsigned int flags) 1777a63b7bbcSBenjamin Marzinski { 1778a63b7bbcSBenjamin Marzinski flags &= ~RENAME_NOREPLACE; 1779a63b7bbcSBenjamin Marzinski 1780a63b7bbcSBenjamin Marzinski if (flags & ~RENAME_EXCHANGE) 1781a63b7bbcSBenjamin Marzinski return -EINVAL; 1782a63b7bbcSBenjamin Marzinski 1783a63b7bbcSBenjamin Marzinski if (flags & RENAME_EXCHANGE) 1784a63b7bbcSBenjamin Marzinski return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1785a63b7bbcSBenjamin Marzinski 1786a63b7bbcSBenjamin Marzinski return gfs2_rename(odir, odentry, ndir, ndentry); 1787a63b7bbcSBenjamin Marzinski } 1788a63b7bbcSBenjamin Marzinski 1789a63b7bbcSBenjamin Marzinski /** 17906b255391SAl Viro * gfs2_get_link - Follow a symbolic link 17912ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 17926b255391SAl Viro * @inode: The inode of the link 1793fceef393SAl Viro * @done: destructor for return value 17942ab9cd1cSSteven Whitehouse * 17952ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 17962ab9cd1cSSteven Whitehouse * 17972ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 17982ab9cd1cSSteven Whitehouse */ 17992ab9cd1cSSteven Whitehouse 18006b255391SAl Viro static const char *gfs2_get_link(struct dentry *dentry, 1801fceef393SAl Viro struct inode *inode, 1802fceef393SAl Viro struct delayed_call *done) 18032ab9cd1cSSteven Whitehouse { 18046b255391SAl Viro struct gfs2_inode *ip = GFS2_I(inode); 18052ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18062ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1807160b4026SSteven Whitehouse unsigned int size; 18082ab9cd1cSSteven Whitehouse char *buf; 18092ab9cd1cSSteven Whitehouse int error; 18102ab9cd1cSSteven Whitehouse 18116b255391SAl Viro if (!dentry) 18126b255391SAl Viro return ERR_PTR(-ECHILD); 18136b255391SAl Viro 18142ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 18152ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 18162ab9cd1cSSteven Whitehouse if (error) { 18172ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 1818680baacbSAl Viro return ERR_PTR(error); 18192ab9cd1cSSteven Whitehouse } 18202ab9cd1cSSteven Whitehouse 18212ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 18222ab9cd1cSSteven Whitehouse if (size == 0) { 18232ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 18242ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 18252ab9cd1cSSteven Whitehouse goto out; 18262ab9cd1cSSteven Whitehouse } 18272ab9cd1cSSteven Whitehouse 18282ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 18292ab9cd1cSSteven Whitehouse if (error) { 18302ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 18312ab9cd1cSSteven Whitehouse goto out; 18322ab9cd1cSSteven Whitehouse } 18332ab9cd1cSSteven Whitehouse 1834160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 18352ab9cd1cSSteven Whitehouse if (!buf) 18362ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 18372ab9cd1cSSteven Whitehouse else 1838160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 18392ab9cd1cSSteven Whitehouse brelse(dibh); 18402ab9cd1cSSteven Whitehouse out: 18412ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 1842680baacbSAl Viro if (!IS_ERR(buf)) 1843fceef393SAl Viro set_delayed_call(done, kfree_link, buf); 1844680baacbSAl Viro return buf; 18452ab9cd1cSSteven Whitehouse } 18462ab9cd1cSSteven Whitehouse 18472ab9cd1cSSteven Whitehouse /** 1848c551f66cSLee Jones * gfs2_permission 18494609e1f1SChristian Brauner * @idmap: idmap of the mount the inode was found from 18502ab9cd1cSSteven Whitehouse * @inode: The inode 18512ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 18522ab9cd1cSSteven Whitehouse * 18532ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18542ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18552ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 18562ab9cd1cSSteven Whitehouse * 18572ab9cd1cSSteven Whitehouse * Returns: errno 18582ab9cd1cSSteven Whitehouse */ 18592ab9cd1cSSteven Whitehouse 18604609e1f1SChristian Brauner int gfs2_permission(struct mnt_idmap *idmap, struct inode *inode, 1861549c7297SChristian Brauner int mask) 18622ab9cd1cSSteven Whitehouse { 18632ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 18642ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18652ab9cd1cSSteven Whitehouse int error; 18662ab9cd1cSSteven Whitehouse 18676df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 18682ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 18692ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 187010556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 18712ab9cd1cSSteven Whitehouse return -ECHILD; 18722ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 18732ab9cd1cSSteven Whitehouse if (error) 18742ab9cd1cSSteven Whitehouse return error; 18752ab9cd1cSSteven Whitehouse } 18762ab9cd1cSSteven Whitehouse 18772ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1878337684a1SEryu Guan error = -EPERM; 18792ab9cd1cSSteven Whitehouse else 18804609e1f1SChristian Brauner error = generic_permission(&nop_mnt_idmap, inode, mask); 18816df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 18822ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 18832ab9cd1cSSteven Whitehouse 18842ab9cd1cSSteven Whitehouse return error; 18852ab9cd1cSSteven Whitehouse } 18862ab9cd1cSSteven Whitehouse 1887ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18882ab9cd1cSSteven Whitehouse { 1889c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, attr); 18902ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 18912ab9cd1cSSteven Whitehouse return 0; 18922ab9cd1cSSteven Whitehouse } 18932ab9cd1cSSteven Whitehouse 1894a4122a95SAndreas Gruenbacher static int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18952ab9cd1cSSteven Whitehouse { 18962ab9cd1cSSteven Whitehouse int error; 18972ab9cd1cSSteven Whitehouse 18982ab9cd1cSSteven Whitehouse if (current->journal_info) 1899ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 19002ab9cd1cSSteven Whitehouse 1901ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 19022ab9cd1cSSteven Whitehouse if (error) 19032ab9cd1cSSteven Whitehouse return error; 19042ab9cd1cSSteven Whitehouse 1905ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1906ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 19072ab9cd1cSSteven Whitehouse return error; 19082ab9cd1cSSteven Whitehouse } 19092ab9cd1cSSteven Whitehouse 19102ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 19112ab9cd1cSSteven Whitehouse { 19122ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19132ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 19147c06b5d6SEric W. Biederman kuid_t ouid, nuid; 19157c06b5d6SEric W. Biederman kgid_t ogid, ngid; 19162ab9cd1cSSteven Whitehouse int error; 1917b8fbf471SAbhi Das struct gfs2_alloc_parms ap; 19182ab9cd1cSSteven Whitehouse 19192ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 19202ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 19212ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 19222ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 19232ab9cd1cSSteven Whitehouse 19246b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1925f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 19266b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1927f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 19282fba46a0SBob Peterson error = gfs2_qa_get(ip); 192962e96cf8SBob Peterson if (error) 19302fba46a0SBob Peterson return error; 193162e96cf8SBob Peterson 193262e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 193362e96cf8SBob Peterson if (error) 193462e96cf8SBob Peterson goto out; 193562e96cf8SBob Peterson 193662e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 193762e96cf8SBob Peterson if (error) 193862e96cf8SBob Peterson goto out; 193962e96cf8SBob Peterson 1940b8fbf471SAbhi Das ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1941b8fbf471SAbhi Das 19426b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19436b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1944b8fbf471SAbhi Das error = gfs2_quota_check(ip, nuid, ngid, &ap); 19452ab9cd1cSSteven Whitehouse if (error) 19462ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19472ab9cd1cSSteven Whitehouse } 19482ab9cd1cSSteven Whitehouse 19492ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 19502ab9cd1cSSteven Whitehouse if (error) 19512ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19522ab9cd1cSSteven Whitehouse 1953ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 19542ab9cd1cSSteven Whitehouse if (error) 19552ab9cd1cSSteven Whitehouse goto out_end_trans; 19562ab9cd1cSSteven Whitehouse 19576b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19586b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 195939a72580SAbhi Das gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1960b8fbf471SAbhi Das gfs2_quota_change(ip, ap.target, nuid, ngid); 19612ab9cd1cSSteven Whitehouse } 19622ab9cd1cSSteven Whitehouse 19632ab9cd1cSSteven Whitehouse out_end_trans: 19642ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 19652ab9cd1cSSteven Whitehouse out_gunlock_q: 19662ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 196762e96cf8SBob Peterson out: 19682fba46a0SBob Peterson gfs2_qa_put(ip); 19692ab9cd1cSSteven Whitehouse return error; 19702ab9cd1cSSteven Whitehouse } 19712ab9cd1cSSteven Whitehouse 19722ab9cd1cSSteven Whitehouse /** 19732ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 1974c1632a0fSChristian Brauner * @idmap: idmap of the mount the inode was found from 19752ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 19762ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 19772ab9cd1cSSteven Whitehouse * 19782ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 19792ab9cd1cSSteven Whitehouse * that change out to disk. 19802ab9cd1cSSteven Whitehouse * 19812ab9cd1cSSteven Whitehouse * Returns: errno 19822ab9cd1cSSteven Whitehouse */ 19832ab9cd1cSSteven Whitehouse 1984c1632a0fSChristian Brauner static int gfs2_setattr(struct mnt_idmap *idmap, 1985549c7297SChristian Brauner struct dentry *dentry, struct iattr *attr) 19862ab9cd1cSSteven Whitehouse { 19872b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 19882ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19892ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 19902ab9cd1cSSteven Whitehouse int error; 19912ab9cd1cSSteven Whitehouse 19922fba46a0SBob Peterson error = gfs2_qa_get(ip); 19930a305e49SBob Peterson if (error) 19940a305e49SBob Peterson return error; 19950a305e49SBob Peterson 19962ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 19972ab9cd1cSSteven Whitehouse if (error) 19982fba46a0SBob Peterson goto out; 19992ab9cd1cSSteven Whitehouse 20004609e1f1SChristian Brauner error = may_setattr(&nop_mnt_idmap, inode, attr->ia_valid); 2001d75b9fa0SAndreas Gruenbacher if (error) 20022fba46a0SBob Peterson goto error; 20032ab9cd1cSSteven Whitehouse 2004c1632a0fSChristian Brauner error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 20052ab9cd1cSSteven Whitehouse if (error) 20062fba46a0SBob Peterson goto error; 20072ab9cd1cSSteven Whitehouse 20082ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 20092ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 20102ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 20112ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 2012e01580bfSChristoph Hellwig else { 2013ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 2014e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 201513e83a49SChristian Brauner error = posix_acl_chmod(&nop_mnt_idmap, dentry, 2016e65ce2a5SChristian Brauner inode->i_mode); 2017e01580bfSChristoph Hellwig } 20182ab9cd1cSSteven Whitehouse 20192fba46a0SBob Peterson error: 20202ab9cd1cSSteven Whitehouse if (!error) 20212ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 2022ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 20232fba46a0SBob Peterson out: 20242fba46a0SBob Peterson gfs2_qa_put(ip); 20252ab9cd1cSSteven Whitehouse return error; 20262ab9cd1cSSteven Whitehouse } 20272ab9cd1cSSteven Whitehouse 20282ab9cd1cSSteven Whitehouse /** 20292ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 2030b74d24f7SChristian Brauner * @idmap: idmap of the mount the inode was found from 2031a528d35eSDavid Howells * @path: Object to query 20322ab9cd1cSSteven Whitehouse * @stat: The inode's stats 2033a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 2034a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 20352ab9cd1cSSteven Whitehouse * 20362ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 20372ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 20382ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 20392ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 20402ab9cd1cSSteven Whitehouse * with the glock already held. 20412ab9cd1cSSteven Whitehouse * 20422ab9cd1cSSteven Whitehouse * Returns: errno 20432ab9cd1cSSteven Whitehouse */ 20442ab9cd1cSSteven Whitehouse 2045b74d24f7SChristian Brauner static int gfs2_getattr(struct mnt_idmap *idmap, 2046549c7297SChristian Brauner const struct path *path, struct kstat *stat, 2047a528d35eSDavid Howells u32 request_mask, unsigned int flags) 20482ab9cd1cSSteven Whitehouse { 2049a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 20502ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20512ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 2052b2623c2fSAndreas Gruenbacher u32 gfsflags; 20532ab9cd1cSSteven Whitehouse int error; 20542ab9cd1cSSteven Whitehouse 20556df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 20562ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 20572ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 20582ab9cd1cSSteven Whitehouse if (error) 20592ab9cd1cSSteven Whitehouse return error; 20602ab9cd1cSSteven Whitehouse } 20612ab9cd1cSSteven Whitehouse 2062b2623c2fSAndreas Gruenbacher gfsflags = ip->i_diskflags; 2063b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_APPENDONLY) 2064b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_APPEND; 2065b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_IMMUTABLE) 2066b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_IMMUTABLE; 2067b2623c2fSAndreas Gruenbacher 2068b2623c2fSAndreas Gruenbacher stat->attributes_mask |= (STATX_ATTR_APPEND | 2069b2623c2fSAndreas Gruenbacher STATX_ATTR_COMPRESSED | 2070b2623c2fSAndreas Gruenbacher STATX_ATTR_ENCRYPTED | 2071b2623c2fSAndreas Gruenbacher STATX_ATTR_IMMUTABLE | 2072b2623c2fSAndreas Gruenbacher STATX_ATTR_NODUMP); 2073b2623c2fSAndreas Gruenbacher 2074b74d24f7SChristian Brauner generic_fillattr(&nop_mnt_idmap, inode, stat); 2075b2623c2fSAndreas Gruenbacher 20766df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 20772ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 20782ab9cd1cSSteven Whitehouse 20792ab9cd1cSSteven Whitehouse return 0; 20802ab9cd1cSSteven Whitehouse } 20812ab9cd1cSSteven Whitehouse 20822ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 20832ab9cd1cSSteven Whitehouse u64 start, u64 len) 20842ab9cd1cSSteven Whitehouse { 20852ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20862ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 20872ab9cd1cSSteven Whitehouse int ret; 20882ab9cd1cSSteven Whitehouse 2089aac1a55bSBob Peterson inode_lock_shared(inode); 20902ab9cd1cSSteven Whitehouse 20912ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20922ab9cd1cSSteven Whitehouse if (ret) 20932ab9cd1cSSteven Whitehouse goto out; 20942ab9cd1cSSteven Whitehouse 2095aac1a55bSBob Peterson ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 20962ab9cd1cSSteven Whitehouse 20972ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 2098aac1a55bSBob Peterson 20992ab9cd1cSSteven Whitehouse out: 2100aac1a55bSBob Peterson inode_unlock_shared(inode); 21012ab9cd1cSSteven Whitehouse return ret; 21022ab9cd1cSSteven Whitehouse } 21032ab9cd1cSSteven Whitehouse 21043a27411cSAndreas Gruenbacher loff_t gfs2_seek_data(struct file *file, loff_t offset) 21053a27411cSAndreas Gruenbacher { 21063a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21073a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21083a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21093a27411cSAndreas Gruenbacher loff_t ret; 21103a27411cSAndreas Gruenbacher 21113a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21123a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21133a27411cSAndreas Gruenbacher if (!ret) 21143a27411cSAndreas Gruenbacher ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 21153a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21163a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21173a27411cSAndreas Gruenbacher 21183a27411cSAndreas Gruenbacher if (ret < 0) 21193a27411cSAndreas Gruenbacher return ret; 21203a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21213a27411cSAndreas Gruenbacher } 21223a27411cSAndreas Gruenbacher 21233a27411cSAndreas Gruenbacher loff_t gfs2_seek_hole(struct file *file, loff_t offset) 21243a27411cSAndreas Gruenbacher { 21253a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21263a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21273a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21283a27411cSAndreas Gruenbacher loff_t ret; 21293a27411cSAndreas Gruenbacher 21303a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21313a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21323a27411cSAndreas Gruenbacher if (!ret) 21333a27411cSAndreas Gruenbacher ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 21343a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21353a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21363a27411cSAndreas Gruenbacher 21373a27411cSAndreas Gruenbacher if (ret < 0) 21383a27411cSAndreas Gruenbacher return ret; 21393a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21403a27411cSAndreas Gruenbacher } 21413a27411cSAndreas Gruenbacher 214282e938bdSAndreas Gruenbacher static int gfs2_update_time(struct inode *inode, struct timespec64 *time, 214382e938bdSAndreas Gruenbacher int flags) 214482e938bdSAndreas Gruenbacher { 214582e938bdSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 214682e938bdSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_gl; 214782e938bdSAndreas Gruenbacher struct gfs2_holder *gh; 214882e938bdSAndreas Gruenbacher int error; 214982e938bdSAndreas Gruenbacher 215082e938bdSAndreas Gruenbacher gh = gfs2_glock_is_locked_by_me(gl); 215182e938bdSAndreas Gruenbacher if (gh && !gfs2_glock_is_held_excl(gl)) { 215282e938bdSAndreas Gruenbacher gfs2_glock_dq(gh); 215382e938bdSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); 215482e938bdSAndreas Gruenbacher error = gfs2_glock_nq(gh); 215582e938bdSAndreas Gruenbacher if (error) 215682e938bdSAndreas Gruenbacher return error; 215782e938bdSAndreas Gruenbacher } 215882e938bdSAndreas Gruenbacher return generic_update_time(inode, time, flags); 215982e938bdSAndreas Gruenbacher } 216082e938bdSAndreas Gruenbacher 2161e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops = { 21622ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21632ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21642ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21652ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21662ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2167cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2168e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 216982e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 217088b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 217188b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21722ab9cd1cSSteven Whitehouse }; 21732ab9cd1cSSteven Whitehouse 2174e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops = { 21752ab9cd1cSSteven Whitehouse .create = gfs2_create, 21762ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 21772ab9cd1cSSteven Whitehouse .link = gfs2_link, 21782ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 21792ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 21802ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 21812ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 21822ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 21832773bf00SMiklos Szeredi .rename = gfs2_rename2, 21842ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21852ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21862ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21872ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21882ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2189cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2190e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 219182e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21926d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 219388b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 219488b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21952ab9cd1cSSteven Whitehouse }; 21962ab9cd1cSSteven Whitehouse 2197e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops = { 21986b255391SAl Viro .get_link = gfs2_get_link, 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, 22042ab9cd1cSSteven Whitehouse }; 22052ab9cd1cSSteven Whitehouse 2206