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); 2282ab9cd1cSSteven Whitehouse iget_failed(inode); 2292ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2302ab9cd1cSSteven Whitehouse } 2312ab9cd1cSSteven Whitehouse 2326bdcadeaSAndreas Gruenbacher /** 2336bdcadeaSAndreas Gruenbacher * gfs2_lookup_by_inum - look up an inode by inode number 2346bdcadeaSAndreas Gruenbacher * @sdp: The super block 2356bdcadeaSAndreas Gruenbacher * @no_addr: The inode number 2366bdcadeaSAndreas Gruenbacher * @no_formal_ino: The inode generation number (0 for any) 2376bdcadeaSAndreas Gruenbacher * @blktype: Requested block type (see gfs2_inode_lookup) 2386bdcadeaSAndreas Gruenbacher */ 2392ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2406bdcadeaSAndreas Gruenbacher u64 no_formal_ino, unsigned int blktype) 2412ab9cd1cSSteven Whitehouse { 2422ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2433ce37b2cSAndreas Gruenbacher struct inode *inode; 2442ab9cd1cSSteven Whitehouse int error; 2452ab9cd1cSSteven Whitehouse 246b66648adSAndreas Gruenbacher inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, 247b66648adSAndreas Gruenbacher blktype); 2482ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2493ce37b2cSAndreas Gruenbacher return inode; 2502ab9cd1cSSteven Whitehouse 2512ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2522ab9cd1cSSteven Whitehouse error = -EIO; 2532ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2542ab9cd1cSSteven Whitehouse goto fail_iput; 2552ab9cd1cSSteven Whitehouse } 2563ce37b2cSAndreas Gruenbacher return inode; 2572ab9cd1cSSteven Whitehouse 2582ab9cd1cSSteven Whitehouse fail_iput: 2592ab9cd1cSSteven Whitehouse iput(inode); 2603ce37b2cSAndreas Gruenbacher return ERR_PTR(error); 2612ab9cd1cSSteven Whitehouse } 2622ab9cd1cSSteven Whitehouse 2632ab9cd1cSSteven Whitehouse 2642ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2652ab9cd1cSSteven Whitehouse { 2662ab9cd1cSSteven Whitehouse struct qstr qstr; 2672ab9cd1cSSteven Whitehouse struct inode *inode; 2682ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2692ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2702ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2712ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2722ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2732ab9cd1cSSteven Whitehouse * and do not check for NULL. 2742ab9cd1cSSteven Whitehouse */ 2752ab9cd1cSSteven Whitehouse if (inode == NULL) 2762ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2772ab9cd1cSSteven Whitehouse else 2782ab9cd1cSSteven Whitehouse return inode; 2792ab9cd1cSSteven Whitehouse } 2802ab9cd1cSSteven Whitehouse 2812ab9cd1cSSteven Whitehouse 2822ab9cd1cSSteven Whitehouse /** 2832ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 284c551f66cSLee Jones * @dir: The inode of the directory containing the inode to look-up 2852ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2862ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2872ab9cd1cSSteven Whitehouse * 2882ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2892ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2902ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2912ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2922ab9cd1cSSteven Whitehouse * 2932ab9cd1cSSteven Whitehouse * Returns: errno 2942ab9cd1cSSteven Whitehouse */ 2952ab9cd1cSSteven Whitehouse 2962ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 2972ab9cd1cSSteven Whitehouse int is_root) 2982ab9cd1cSSteven Whitehouse { 2992ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 3002ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 3012ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 3022ab9cd1cSSteven Whitehouse int error = 0; 3032ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 3042ab9cd1cSSteven Whitehouse 3056df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&d_gh); 3062ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 3072ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 3082ab9cd1cSSteven Whitehouse 3092ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 3102ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 3112b0143b5SDavid Howells dir == d_inode(sb->s_root))) { 3122ab9cd1cSSteven Whitehouse igrab(dir); 3132ab9cd1cSSteven Whitehouse return dir; 3142ab9cd1cSSteven Whitehouse } 3152ab9cd1cSSteven Whitehouse 3162ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3172ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3182ab9cd1cSSteven Whitehouse if (error) 3192ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3202ab9cd1cSSteven Whitehouse } 3212ab9cd1cSSteven Whitehouse 3222ab9cd1cSSteven Whitehouse if (!is_root) { 323549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, dir, MAY_EXEC); 3242ab9cd1cSSteven Whitehouse if (error) 3252ab9cd1cSSteven Whitehouse goto out; 3262ab9cd1cSSteven Whitehouse } 3272ab9cd1cSSteven Whitehouse 3285a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3292ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3302ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3312ab9cd1cSSteven Whitehouse out: 3326df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&d_gh)) 3332ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3342ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3352ab9cd1cSSteven Whitehouse return NULL; 3362ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3372ab9cd1cSSteven Whitehouse } 3382ab9cd1cSSteven Whitehouse 3392ab9cd1cSSteven Whitehouse /** 3402ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3412ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3422ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3432ab9cd1cSSteven Whitehouse * @mode: 3442ab9cd1cSSteven Whitehouse * 3452ab9cd1cSSteven Whitehouse * Returns: errno 3462ab9cd1cSSteven Whitehouse */ 3472ab9cd1cSSteven Whitehouse 3482ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 349175a4eb7SAl Viro umode_t mode) 3502ab9cd1cSSteven Whitehouse { 3512ab9cd1cSSteven Whitehouse int error; 3522ab9cd1cSSteven Whitehouse 353549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, &dip->i_inode, 354549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 3552ab9cd1cSSteven Whitehouse if (error) 3562ab9cd1cSSteven Whitehouse return error; 3572ab9cd1cSSteven Whitehouse 3582ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3592ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3602ab9cd1cSSteven Whitehouse return -ENOENT; 3612ab9cd1cSSteven Whitehouse 3622ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3632ab9cd1cSSteven Whitehouse return -EFBIG; 3642ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3652ab9cd1cSSteven Whitehouse return -EMLINK; 3662ab9cd1cSSteven Whitehouse 3672ab9cd1cSSteven Whitehouse return 0; 3682ab9cd1cSSteven Whitehouse } 3692ab9cd1cSSteven Whitehouse 370c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 371c9aecf73SSteven Whitehouse struct inode *inode) 3722ab9cd1cSSteven Whitehouse { 3732ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3746b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3756b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 376c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 377c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3786b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 379c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 380c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3812ab9cd1cSSteven Whitehouse } else 382c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3832ab9cd1cSSteven Whitehouse 3842ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 385c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 386c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 387c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3882ab9cd1cSSteven Whitehouse } else 389c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3902ab9cd1cSSteven Whitehouse } 3912ab9cd1cSSteven Whitehouse 392b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 3932ab9cd1cSSteven Whitehouse { 394c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 395b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 3962ab9cd1cSSteven Whitehouse int error; 3972ab9cd1cSSteven Whitehouse 398b8fbf471SAbhi Das error = gfs2_quota_lock_check(ip, &ap); 3992ab9cd1cSSteven Whitehouse if (error) 4002ab9cd1cSSteven Whitehouse goto out; 4012ab9cd1cSSteven Whitehouse 4027b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 403fd4b4e04SSteven Whitehouse if (error) 404fd4b4e04SSteven Whitehouse goto out_quota; 405fd4b4e04SSteven Whitehouse 406b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 4072ab9cd1cSSteven Whitehouse if (error) 4082ab9cd1cSSteven Whitehouse goto out_ipreserv; 4092ab9cd1cSSteven Whitehouse 410b2c8b3eaSSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 41135c23fbaSAndreas Gruenbacher if (error) 41235c23fbaSAndreas Gruenbacher goto out_trans_end; 41335c23fbaSAndreas Gruenbacher 414c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 415c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 416c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 41738552ff6SAndreas Gruenbacher if (*dblocks > 1) 41838552ff6SAndreas Gruenbacher ip->i_eattr = ip->i_no_addr + 1; 4192ab9cd1cSSteven Whitehouse 42035c23fbaSAndreas Gruenbacher out_trans_end: 4212ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4222ab9cd1cSSteven Whitehouse out_ipreserv: 423c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 424fd4b4e04SSteven Whitehouse out_quota: 425fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4262ab9cd1cSSteven Whitehouse out: 4272ab9cd1cSSteven Whitehouse return error; 4282ab9cd1cSSteven Whitehouse } 4292ab9cd1cSSteven Whitehouse 430f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 431f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 432e2d0a13bSSteven Whitehouse { 433e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 434e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 435e2d0a13bSSteven Whitehouse 436e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 437e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 438e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 439e2d0a13bSSteven Whitehouse 440e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 441e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 442e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 443e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 444e2d0a13bSSteven Whitehouse 445e2d0a13bSSteven Whitehouse } 446e2d0a13bSSteven Whitehouse 4472ab9cd1cSSteven Whitehouse /** 448b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 449b2c8b3eaSSteven Whitehouse * @ip: The inode in question 450b2c8b3eaSSteven Whitehouse * 451b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 452b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 453b2c8b3eaSSteven Whitehouse */ 454b2c8b3eaSSteven Whitehouse 455b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 456b2c8b3eaSSteven Whitehouse { 457b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 458b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 459b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 460b2c8b3eaSSteven Whitehouse 461b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 462b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 463b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 464b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 465b2c8b3eaSSteven Whitehouse 466b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 467b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 468b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 469b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 470b2c8b3eaSSteven Whitehouse 471b2c8b3eaSSteven Whitehouse brelse(bh); 472b2c8b3eaSSteven Whitehouse } 473b2c8b3eaSSteven Whitehouse 474b2c8b3eaSSteven Whitehouse /** 4752ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 476f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 477c9aecf73SSteven Whitehouse * @ip: The inode 478f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 4792ab9cd1cSSteven Whitehouse * 4802ab9cd1cSSteven Whitehouse */ 4812ab9cd1cSSteven Whitehouse 482c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 48379ba7480SSteven Whitehouse const char *symname) 4842ab9cd1cSSteven Whitehouse { 4852ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4862ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4872ab9cd1cSSteven Whitehouse 488c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 489350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4902ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 49179ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4922ab9cd1cSSteven Whitehouse 4936f24784fSAl Viro di->di_major = cpu_to_be32(imajor(&ip->i_inode)); 4946f24784fSAl Viro di->di_minor = cpu_to_be32(iminor(&ip->i_inode)); 4952ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4962ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4972ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4982ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4992ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 50079ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 5012ab9cd1cSSteven Whitehouse 502c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 503160b4026SSteven Whitehouse case S_IFDIR: 504e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 505160b4026SSteven Whitehouse break; 506160b4026SSteven Whitehouse case S_IFLNK: 507c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 508160b4026SSteven Whitehouse break; 509e2d0a13bSSteven Whitehouse } 510e2d0a13bSSteven Whitehouse 5112ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 51279ba7480SSteven Whitehouse brelse(dibh); 5132ab9cd1cSSteven Whitehouse } 5142ab9cd1cSSteven Whitehouse 515534cf9caSSteven Whitehouse /** 516c551f66cSLee Jones * gfs2_trans_da_blks - Calculate number of blocks to link inode 517534cf9caSSteven Whitehouse * @dip: The directory we are linking into 518534cf9caSSteven Whitehouse * @da: The dir add information 519534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 520534cf9caSSteven Whitehouse * 521534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 522534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 523534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 524534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 525534cf9caSSteven Whitehouse * 526534cf9caSSteven Whitehouse * Returns: Number of blocks 527534cf9caSSteven Whitehouse */ 528534cf9caSSteven Whitehouse 529534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 530534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 531534cf9caSSteven Whitehouse unsigned nr_inodes) 532534cf9caSSteven Whitehouse { 533534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 534534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 535534cf9caSSteven Whitehouse } 536534cf9caSSteven Whitehouse 5372ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5383c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5392ab9cd1cSSteven Whitehouse { 5402ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5413c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5422ab9cd1cSSteven Whitehouse int error; 5432ab9cd1cSSteven Whitehouse 5443c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 545b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 5462ab9cd1cSSteven Whitehouse if (error) 5472ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5482ab9cd1cSSteven Whitehouse 5497b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5502ab9cd1cSSteven Whitehouse if (error) 5512ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5522ab9cd1cSSteven Whitehouse 553534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5542ab9cd1cSSteven Whitehouse if (error) 5552ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5562ab9cd1cSSteven Whitehouse } else { 5572ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5582ab9cd1cSSteven Whitehouse if (error) 5592ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5602ab9cd1cSSteven Whitehouse } 5612ab9cd1cSSteven Whitehouse 5622b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5632ab9cd1cSSteven Whitehouse 5642ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5652ab9cd1cSSteven Whitehouse fail_ipreserv: 5662ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5672ab9cd1cSSteven Whitehouse fail_quota_locks: 5682ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5692ab9cd1cSSteven Whitehouse return error; 5702ab9cd1cSSteven Whitehouse } 5712ab9cd1cSSteven Whitehouse 57246cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5739d8f13baSMimi Zohar void *fs_info) 5742ab9cd1cSSteven Whitehouse { 5759d8f13baSMimi Zohar const struct xattr *xattr; 5769d8f13baSMimi Zohar int err = 0; 5772ab9cd1cSSteven Whitehouse 5789d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5799d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5809d8f13baSMimi Zohar xattr->value_len, 0, 5819d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5829d8f13baSMimi Zohar if (err < 0) 5839d8f13baSMimi Zohar break; 5849d8f13baSMimi Zohar } 5852ab9cd1cSSteven Whitehouse return err; 5862ab9cd1cSSteven Whitehouse } 5872ab9cd1cSSteven Whitehouse 5882ab9cd1cSSteven Whitehouse /** 589f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 590f2741d98SSteven Whitehouse * @dir: The parent directory 591f2741d98SSteven Whitehouse * @dentry: The new dentry 5926d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 593f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 594f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 595f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 596f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 597c551f66cSLee Jones * @excl: Force fail if inode exists 5982ab9cd1cSSteven Whitehouse * 59938552ff6SAndreas Gruenbacher * FIXME: Change to allocate the disk blocks and write them out in the same 60038552ff6SAndreas Gruenbacher * transaction. That way, we can no longer end up in a situation in which an 60138552ff6SAndreas Gruenbacher * inode is allocated, the node crashes, and the block looks like a valid 60238552ff6SAndreas Gruenbacher * inode. (With atomic creates in place, we will also no longer need to zero 60338552ff6SAndreas Gruenbacher * the link count and dirty the inode here on failure.) 60438552ff6SAndreas Gruenbacher * 605f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 6062ab9cd1cSSteven Whitehouse */ 6072ab9cd1cSSteven Whitehouse 608f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 6096d4ade98SSteven Whitehouse struct file *file, 610175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 611b452a458SAl Viro unsigned int size, int excl) 6122ab9cd1cSSteven Whitehouse { 613f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 614e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 615761fdbbcSAndreas Gruenbacher struct gfs2_holder d_gh, gh; 6162ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 6178e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 6182ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 619a55a47a3SAndreas Gruenbacher struct gfs2_glock *io_gl; 62038552ff6SAndreas Gruenbacher int error; 6219dbe9610SSteven Whitehouse u32 aflags = 0; 622b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 62319aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 6242ab9cd1cSSteven Whitehouse 6252ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 626f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6272ab9cd1cSSteven Whitehouse 6282fba46a0SBob Peterson error = gfs2_qa_get(dip); 6290a305e49SBob Peterson if (error) 6300a305e49SBob Peterson return error; 6310a305e49SBob Peterson 632fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 633fd4b4e04SSteven Whitehouse if (error) 6342fba46a0SBob Peterson goto fail; 635fd4b4e04SSteven Whitehouse 636761fdbbcSAndreas Gruenbacher error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); 6372ab9cd1cSSteven Whitehouse if (error) 6382ab9cd1cSSteven Whitehouse goto fail; 639761fdbbcSAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 6402ab9cd1cSSteven Whitehouse 6412ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6422ab9cd1cSSteven Whitehouse if (error) 6432ab9cd1cSSteven Whitehouse goto fail_gunlock; 6442ab9cd1cSSteven Whitehouse 6455a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6465a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6475a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 648571a4b57SAl Viro if (S_ISDIR(inode->i_mode)) { 649571a4b57SAl Viro iput(inode); 650571a4b57SAl Viro inode = ERR_PTR(-EISDIR); 651571a4b57SAl Viro goto fail_gunlock; 652571a4b57SAl Viro } 65344bb31baSAl Viro d_instantiate(dentry, inode); 6546d4ade98SSteven Whitehouse error = 0; 6550d0d1107SMiklos Szeredi if (file) { 65644bb31baSAl Viro if (S_ISREG(inode->i_mode)) 657be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 65844bb31baSAl Viro else 65944bb31baSAl Viro error = finish_no_open(file, NULL); 6605ca1db41SMiklos Szeredi } 661761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 6622297ab61SBob Peterson goto fail; 6635a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6645a00f3ccSSteven Whitehouse goto fail_gunlock; 6655a00f3ccSSteven Whitehouse } 6665a00f3ccSSteven Whitehouse 6673c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 668fd4b4e04SSteven Whitehouse if (error < 0) 669fd4b4e04SSteven Whitehouse goto fail_gunlock; 670fd4b4e04SSteven Whitehouse 671c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 672fd4b4e04SSteven Whitehouse error = -ENOMEM; 673fd4b4e04SSteven Whitehouse if (!inode) 674fd4b4e04SSteven Whitehouse goto fail_gunlock; 6753d0258bcSAndreas Gruenbacher ip = GFS2_I(inode); 676fd4b4e04SSteven Whitehouse 677e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 678e01580bfSChristoph Hellwig if (error) 679783013c0SBob Peterson goto fail_gunlock; 680e01580bfSChristoph Hellwig 6812fba46a0SBob Peterson error = gfs2_qa_get(ip); 682ff7f4cb4SSteven Whitehouse if (error) 683e01580bfSChristoph Hellwig goto fail_free_acls; 684c9aecf73SSteven Whitehouse 685c9aecf73SSteven Whitehouse inode->i_mode = mode; 68679ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 687c9aecf73SSteven Whitehouse inode->i_rdev = dev; 688c9aecf73SSteven Whitehouse inode->i_size = size; 689078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 690c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 69100a158beSAbhi Das check_and_update_goal(dip); 692c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 69328fb3027SSteven Whitehouse ip->i_diskflags = 0; 69428fb3027SSteven Whitehouse ip->i_eattr = 0; 69528fb3027SSteven Whitehouse ip->i_height = 0; 69628fb3027SSteven Whitehouse ip->i_depth = 0; 69728fb3027SSteven Whitehouse ip->i_entries = 0; 698cc963a11SBob Peterson ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 69928fb3027SSteven Whitehouse 70028fb3027SSteven Whitehouse switch(mode & S_IFMT) { 70128fb3027SSteven Whitehouse case S_IFREG: 70228fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 70328fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 70428fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 70528fb3027SSteven Whitehouse gfs2_set_aops(inode); 70628fb3027SSteven Whitehouse break; 70728fb3027SSteven Whitehouse case S_IFDIR: 70828fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 70928fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 71028fb3027SSteven Whitehouse ip->i_entries = 2; 71128fb3027SSteven Whitehouse break; 71228fb3027SSteven Whitehouse } 713acc546fdSAbhi Das 714acc546fdSAbhi Das /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 715acc546fdSAbhi Das if (dip->i_diskflags & GFS2_DIF_SYSTEM) 716acc546fdSAbhi Das ip->i_diskflags |= GFS2_DIF_SYSTEM; 717acc546fdSAbhi Das 71828fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 719c9aecf73SSteven Whitehouse 7202b0143b5SDavid Howells if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 7219dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7229dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7239dbe9610SSteven Whitehouse 724b2c8b3eaSSteven Whitehouse if (default_acl || acl) 725b2c8b3eaSSteven Whitehouse blocks++; 726b2c8b3eaSSteven Whitehouse 727b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 728c9aecf73SSteven Whitehouse if (error) 729c9aecf73SSteven Whitehouse goto fail_free_inode; 730c9aecf73SSteven Whitehouse 731b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 732b2c8b3eaSSteven Whitehouse 733c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 734c9aecf73SSteven Whitehouse if (error) 735c9aecf73SSteven Whitehouse goto fail_free_inode; 73698e5a91aSAndreas Gruenbacher 737dd0ecf54SAndreas Gruenbacher error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 738c9aecf73SSteven Whitehouse if (error) 739c9aecf73SSteven Whitehouse goto fail_free_inode; 740dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 741dd0ecf54SAndreas Gruenbacher 7424ec3c19dSAndreas Gruenbacher retry: 7433d36e57fSAndreas Gruenbacher error = insert_inode_locked4(inode, ip->i_no_addr, iget_test, &ip->i_no_addr); 7444ec3c19dSAndreas Gruenbacher if (error == -EBUSY) 7454ec3c19dSAndreas Gruenbacher goto retry; 7464ec3c19dSAndreas Gruenbacher if (error) 7474ec3c19dSAndreas Gruenbacher goto fail_gunlock2; 7483d36e57fSAndreas Gruenbacher 749ebdc416cSAndreas Gruenbacher error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT | GL_NOPID, 750ebdc416cSAndreas Gruenbacher &ip->i_iopen_gh); 751dd0ecf54SAndreas Gruenbacher if (error) 752dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 753c9aecf73SSteven Whitehouse 754761fdbbcSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); 75529464ee3SAndreas Gruenbacher if (error) 75629464ee3SAndreas Gruenbacher goto fail_gunlock3; 75729464ee3SAndreas Gruenbacher 758b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 759c9aecf73SSteven Whitehouse if (error) 76029464ee3SAndreas Gruenbacher goto fail_gunlock3; 7610a305e49SBob Peterson 76238552ff6SAndreas Gruenbacher if (blocks > 1) 763b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 76479ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 765fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 766fd4b4e04SSteven Whitehouse 7673d36e57fSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 7688793e149SBob Peterson glock_set_object(io_gl, ip); 769c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 770c9aecf73SSteven Whitehouse 771e01580bfSChristoph Hellwig if (default_acl) { 7721a39ba99SAl Viro error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 7732ab9cd1cSSteven Whitehouse if (error) 77429464ee3SAndreas Gruenbacher goto fail_gunlock4; 7756ff9b09eSAndreas Gruenbacher posix_acl_release(default_acl); 7766ff9b09eSAndreas Gruenbacher default_acl = NULL; 7776ff9b09eSAndreas Gruenbacher } 7786ff9b09eSAndreas Gruenbacher if (acl) { 7796ff9b09eSAndreas Gruenbacher error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 7806ff9b09eSAndreas Gruenbacher if (error) 78129464ee3SAndreas Gruenbacher goto fail_gunlock4; 7826ff9b09eSAndreas Gruenbacher posix_acl_release(acl); 7836ff9b09eSAndreas Gruenbacher acl = NULL; 7846ff9b09eSAndreas Gruenbacher } 7852ab9cd1cSSteven Whitehouse 786f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 787f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7882ab9cd1cSSteven Whitehouse if (error) 78929464ee3SAndreas Gruenbacher goto fail_gunlock4; 7902ab9cd1cSSteven Whitehouse 7913c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 7922ab9cd1cSSteven Whitehouse if (error) 79329464ee3SAndreas Gruenbacher goto fail_gunlock4; 7942ab9cd1cSSteven Whitehouse 79579ba7480SSteven Whitehouse mark_inode_dirty(inode); 7966d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 7972c47c1beSBob Peterson /* After instantiate, errors should result in evict which will destroy 7982c47c1beSBob Peterson * both inode and iopen glocks properly. */ 799c5bf8fefSMiklos Szeredi if (file) { 80073a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 801be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 802c5bf8fefSMiklos Szeredi } 803761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 8042297ab61SBob Peterson gfs2_qa_put(ip); 805761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 8062c47c1beSBob Peterson gfs2_glock_put(io_gl); 8072297ab61SBob Peterson gfs2_qa_put(dip); 8083d36e57fSAndreas Gruenbacher unlock_new_inode(inode); 8096d4ade98SSteven Whitehouse return error; 8102ab9cd1cSSteven Whitehouse 81129464ee3SAndreas Gruenbacher fail_gunlock4: 8123d36e57fSAndreas Gruenbacher glock_clear_object(ip->i_gl, ip); 8139c1b2808SBob Peterson glock_clear_object(io_gl, ip); 81429464ee3SAndreas Gruenbacher fail_gunlock3: 815783013c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 8162ab9cd1cSSteven Whitehouse fail_gunlock2: 8172c47c1beSBob Peterson gfs2_glock_put(io_gl); 818c9aecf73SSteven Whitehouse fail_free_inode: 8197336905aSAndreas Gruenbacher gfs2_rs_deltree(&ip->i_res); 8201595548fSAndreas Gruenbacher gfs2_qa_put(ip); 821e01580bfSChristoph Hellwig fail_free_acls: 822e01580bfSChristoph Hellwig posix_acl_release(default_acl); 823e01580bfSChristoph Hellwig posix_acl_release(acl); 8242ab9cd1cSSteven Whitehouse fail_gunlock: 8252b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 826761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&d_gh); 82715a798f7SKefeng Wang if (!IS_ERR_OR_NULL(inode)) { 82838552ff6SAndreas Gruenbacher set_bit(GIF_ALLOC_FAILED, &ip->i_flags); 82979ba7480SSteven Whitehouse clear_nlink(inode); 83038552ff6SAndreas Gruenbacher if (ip->i_no_addr) 83179ba7480SSteven Whitehouse mark_inode_dirty(inode); 8323d36e57fSAndreas Gruenbacher if (inode->i_state & I_NEW) 8333d36e57fSAndreas Gruenbacher iget_failed(inode); 8343d36e57fSAndreas Gruenbacher else 83540ac218fSSteven Whitehouse iput(inode); 83640ac218fSSteven Whitehouse } 837761fdbbcSAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 838761fdbbcSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 8392ab9cd1cSSteven Whitehouse fail: 8402fba46a0SBob Peterson gfs2_qa_put(dip); 841f2741d98SSteven Whitehouse return error; 8422ab9cd1cSSteven Whitehouse } 843f2741d98SSteven Whitehouse 8442ab9cd1cSSteven Whitehouse /** 8452ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 846c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 8472ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8482ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8492ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 850c551f66cSLee Jones * @excl: Force fail if inode exists 8512ab9cd1cSSteven Whitehouse * 8522ab9cd1cSSteven Whitehouse * Returns: errno 8532ab9cd1cSSteven Whitehouse */ 8542ab9cd1cSSteven Whitehouse 855549c7297SChristian Brauner static int gfs2_create(struct user_namespace *mnt_userns, struct inode *dir, 856549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 8572ab9cd1cSSteven Whitehouse { 858b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 8592ab9cd1cSSteven Whitehouse } 8602ab9cd1cSSteven Whitehouse 8612ab9cd1cSSteven Whitehouse /** 8626d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8632ab9cd1cSSteven Whitehouse * @dir: The directory inode 8642ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8656d4ade98SSteven Whitehouse * @file: File to be opened 8662ab9cd1cSSteven Whitehouse * 8672ab9cd1cSSteven Whitehouse * 8682ab9cd1cSSteven Whitehouse * Returns: errno 8692ab9cd1cSSteven Whitehouse */ 8702ab9cd1cSSteven Whitehouse 8716d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 872b452a458SAl Viro struct file *file) 8732ab9cd1cSSteven Whitehouse { 8746d4ade98SSteven Whitehouse struct inode *inode; 8756d4ade98SSteven Whitehouse struct dentry *d; 8762ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8776d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8782ab9cd1cSSteven Whitehouse int error; 8796d4ade98SSteven Whitehouse 8806d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8817b7a9115SBenjamin Coddington if (inode == NULL) { 8827b7a9115SBenjamin Coddington d_add(dentry, NULL); 8836d4ade98SSteven Whitehouse return NULL; 8847b7a9115SBenjamin Coddington } 8856d4ade98SSteven Whitehouse if (IS_ERR(inode)) 8866d4ade98SSteven Whitehouse return ERR_CAST(inode); 8876d4ade98SSteven Whitehouse 8886d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 8892ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8902ab9cd1cSSteven Whitehouse if (error) { 8912ab9cd1cSSteven Whitehouse iput(inode); 8922ab9cd1cSSteven Whitehouse return ERR_PTR(error); 8932ab9cd1cSSteven Whitehouse } 8946d4ade98SSteven Whitehouse 8956d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 896d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 897d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 898d57b9c9aSJ. Bruce Fields return d; 899d57b9c9aSJ. Bruce Fields } 9006d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 901be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 9026d4ade98SSteven Whitehouse 9032ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 9045ca1db41SMiklos Szeredi if (error) { 9055ca1db41SMiklos Szeredi dput(d); 9066d4ade98SSteven Whitehouse return ERR_PTR(error); 9075ca1db41SMiklos Szeredi } 9086d4ade98SSteven Whitehouse return d; 9092ab9cd1cSSteven Whitehouse } 9106d4ade98SSteven Whitehouse 9116d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 9126d4ade98SSteven Whitehouse unsigned flags) 9136d4ade98SSteven Whitehouse { 914b452a458SAl Viro return __gfs2_lookup(dir, dentry, NULL); 9152ab9cd1cSSteven Whitehouse } 9162ab9cd1cSSteven Whitehouse 9172ab9cd1cSSteven Whitehouse /** 9182ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 9192ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 9202ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 9212ab9cd1cSSteven Whitehouse * @dentry: The name of the link 9222ab9cd1cSSteven Whitehouse * 9232ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 9242ab9cd1cSSteven Whitehouse * name in "dentry". 9252ab9cd1cSSteven Whitehouse * 9262ab9cd1cSSteven Whitehouse * Returns: errno 9272ab9cd1cSSteven Whitehouse */ 9282ab9cd1cSSteven Whitehouse 9292ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 9302ab9cd1cSSteven Whitehouse struct dentry *dentry) 9312ab9cd1cSSteven Whitehouse { 9322ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9332ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9342b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 9352ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9362ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 9372ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 93819aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 9392ab9cd1cSSteven Whitehouse int error; 9402ab9cd1cSSteven Whitehouse 9412ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9422ab9cd1cSSteven Whitehouse return -EPERM; 9432ab9cd1cSSteven Whitehouse 9442fba46a0SBob Peterson error = gfs2_qa_get(dip); 9450a305e49SBob Peterson if (error) 9460a305e49SBob Peterson return error; 9470a305e49SBob Peterson 9482ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 9492ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 9502ab9cd1cSSteven Whitehouse 9512ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 9522ab9cd1cSSteven Whitehouse if (error) 9532ab9cd1cSSteven Whitehouse goto out_parent; 9542ab9cd1cSSteven Whitehouse 9552ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 9562ab9cd1cSSteven Whitehouse if (error) 9572ab9cd1cSSteven Whitehouse goto out_child; 9582ab9cd1cSSteven Whitehouse 9592ab9cd1cSSteven Whitehouse error = -ENOENT; 9602ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9612ab9cd1cSSteven Whitehouse goto out_gunlock; 9622ab9cd1cSSteven Whitehouse 963549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, dir, MAY_WRITE | MAY_EXEC); 9642ab9cd1cSSteven Whitehouse if (error) 9652ab9cd1cSSteven Whitehouse goto out_gunlock; 9662ab9cd1cSSteven Whitehouse 9672ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9682ab9cd1cSSteven Whitehouse switch (error) { 9692ab9cd1cSSteven Whitehouse case -ENOENT: 9702ab9cd1cSSteven Whitehouse break; 9712ab9cd1cSSteven Whitehouse case 0: 9722ab9cd1cSSteven Whitehouse error = -EEXIST; 973e5966cf2SGustavo A. R. Silva goto out_gunlock; 9742ab9cd1cSSteven Whitehouse default: 9752ab9cd1cSSteven Whitehouse goto out_gunlock; 9762ab9cd1cSSteven Whitehouse } 9772ab9cd1cSSteven Whitehouse 9782ab9cd1cSSteven Whitehouse error = -EINVAL; 9792ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9802ab9cd1cSSteven Whitehouse goto out_gunlock; 9812ab9cd1cSSteven Whitehouse error = -EFBIG; 9822ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9832ab9cd1cSSteven Whitehouse goto out_gunlock; 9842ab9cd1cSSteven Whitehouse error = -EPERM; 9852ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 9862ab9cd1cSSteven Whitehouse goto out_gunlock; 9872ab9cd1cSSteven Whitehouse error = -EINVAL; 9882ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 9892ab9cd1cSSteven Whitehouse goto out_gunlock; 9902ab9cd1cSSteven Whitehouse error = -EMLINK; 9912ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 9922ab9cd1cSSteven Whitehouse goto out_gunlock; 9932ab9cd1cSSteven Whitehouse 9943c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 9952ab9cd1cSSteven Whitehouse if (error < 0) 9962ab9cd1cSSteven Whitehouse goto out_gunlock; 9972ab9cd1cSSteven Whitehouse 9983c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 9993c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1000b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 10012ab9cd1cSSteven Whitehouse if (error) 10025407e242SBob Peterson goto out_gunlock; 10032ab9cd1cSSteven Whitehouse 10047b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 10052ab9cd1cSSteven Whitehouse if (error) 10062ab9cd1cSSteven Whitehouse goto out_gunlock_q; 10072ab9cd1cSSteven Whitehouse 1008534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 10092ab9cd1cSSteven Whitehouse if (error) 10102ab9cd1cSSteven Whitehouse goto out_ipres; 10112ab9cd1cSSteven Whitehouse } else { 10122ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 10132ab9cd1cSSteven Whitehouse if (error) 10142ab9cd1cSSteven Whitehouse goto out_ipres; 10152ab9cd1cSSteven Whitehouse } 10162ab9cd1cSSteven Whitehouse 10172ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 10182ab9cd1cSSteven Whitehouse if (error) 10192ab9cd1cSSteven Whitehouse goto out_end_trans; 10202ab9cd1cSSteven Whitehouse 10212b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 10222ab9cd1cSSteven Whitehouse if (error) 10232ab9cd1cSSteven Whitehouse goto out_brelse; 10242ab9cd1cSSteven Whitehouse 1025350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 10262ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 1027078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 1028ab9bbda0SSteven Whitehouse ihold(inode); 1029ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 1030ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 10312ab9cd1cSSteven Whitehouse 10322ab9cd1cSSteven Whitehouse out_brelse: 10332ab9cd1cSSteven Whitehouse brelse(dibh); 10342ab9cd1cSSteven Whitehouse out_end_trans: 10352ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10362ab9cd1cSSteven Whitehouse out_ipres: 10373c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10382ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10392ab9cd1cSSteven Whitehouse out_gunlock_q: 10403c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10412ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10422ab9cd1cSSteven Whitehouse out_gunlock: 10432b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 10442ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10452ab9cd1cSSteven Whitehouse out_child: 10462ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10472ab9cd1cSSteven Whitehouse out_parent: 10482297ab61SBob Peterson gfs2_qa_put(dip); 10492ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10502ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10512ab9cd1cSSteven Whitehouse return error; 10522ab9cd1cSSteven Whitehouse } 10532ab9cd1cSSteven Whitehouse 10542ab9cd1cSSteven Whitehouse /* 10552ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10562ab9cd1cSSteven Whitehouse * @dip: the directory 10572ab9cd1cSSteven Whitehouse * @name: the name of the file 10582ab9cd1cSSteven Whitehouse * @ip: the inode 10592ab9cd1cSSteven Whitehouse * 10602ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10612ab9cd1cSSteven Whitehouse * 10622ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10632ab9cd1cSSteven Whitehouse */ 10642ab9cd1cSSteven Whitehouse 10652ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10662ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10672ab9cd1cSSteven Whitehouse { 10682ab9cd1cSSteven Whitehouse int error; 10692ab9cd1cSSteven Whitehouse 10702ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10712ab9cd1cSSteven Whitehouse return -EPERM; 10722ab9cd1cSSteven Whitehouse 10732ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10746b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10756b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10762ab9cd1cSSteven Whitehouse return -EPERM; 10772ab9cd1cSSteven Whitehouse 10782ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10792ab9cd1cSSteven Whitehouse return -EPERM; 10802ab9cd1cSSteven Whitehouse 1081549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, &dip->i_inode, 1082549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 10832ab9cd1cSSteven Whitehouse if (error) 10842ab9cd1cSSteven Whitehouse return error; 10852ab9cd1cSSteven Whitehouse 108637975f15SFabian Frederick return gfs2_dir_check(&dip->i_inode, name, ip); 10872ab9cd1cSSteven Whitehouse } 10882ab9cd1cSSteven Whitehouse 10892ab9cd1cSSteven Whitehouse /** 10902ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10912ab9cd1cSSteven Whitehouse * @dip: The parent directory 1092c551f66cSLee Jones * @dentry: The dentry to unlink 10932ab9cd1cSSteven Whitehouse * 10942ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 10952ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 10962ab9cd1cSSteven Whitehouse * 10972ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10982ab9cd1cSSteven Whitehouse */ 10992ab9cd1cSSteven Whitehouse 11002ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 11014327a9bfSBob Peterson const struct dentry *dentry) 11022ab9cd1cSSteven Whitehouse { 11032b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11042ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11052ab9cd1cSSteven Whitehouse int error; 11062ab9cd1cSSteven Whitehouse 11072ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 11082ab9cd1cSSteven Whitehouse if (error) 11092ab9cd1cSSteven Whitehouse return error; 11102ab9cd1cSSteven Whitehouse 11112ab9cd1cSSteven Whitehouse ip->i_entries = 0; 1112078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 11132ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 11142ab9cd1cSSteven Whitehouse clear_nlink(inode); 11152ab9cd1cSSteven Whitehouse else 11162ab9cd1cSSteven Whitehouse drop_nlink(inode); 11172ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 11182ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11192ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 11202ab9cd1cSSteven Whitehouse return 0; 11212ab9cd1cSSteven Whitehouse } 11222ab9cd1cSSteven Whitehouse 11232ab9cd1cSSteven Whitehouse 11242ab9cd1cSSteven Whitehouse /** 11252ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 11262ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 11272ab9cd1cSSteven Whitehouse * @dentry: The file itself 11282ab9cd1cSSteven Whitehouse * 11292ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 11302ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 11312ab9cd1cSSteven Whitehouse * 11322ab9cd1cSSteven Whitehouse * Returns: errno 11332ab9cd1cSSteven Whitehouse */ 11342ab9cd1cSSteven Whitehouse 11352ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11362ab9cd1cSSteven Whitehouse { 11372ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11382ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11392b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11402ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11412ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 11422ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11435e2f7d61SBob Peterson int error; 11445e2f7d61SBob Peterson 11455e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11465e2f7d61SBob Peterson if (error) 11475e2f7d61SBob Peterson return error; 11485e2f7d61SBob Peterson 11495e2f7d61SBob Peterson error = -EROFS; 11502ab9cd1cSSteven Whitehouse 11512ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 11522ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 11532ab9cd1cSSteven Whitehouse 115466fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1155a365fbf3SSteven Whitehouse if (!rgd) 115687654896SSteven Whitehouse goto out_inodes; 1157a365fbf3SSteven Whitehouse 11584fc7ec31SBob Peterson gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2); 11592ab9cd1cSSteven Whitehouse 11602ab9cd1cSSteven Whitehouse 11612ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 11622ab9cd1cSSteven Whitehouse if (error) 11632ab9cd1cSSteven Whitehouse goto out_parent; 11642ab9cd1cSSteven Whitehouse 11652ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 11662ab9cd1cSSteven Whitehouse if (error) 11672ab9cd1cSSteven Whitehouse goto out_child; 11682ab9cd1cSSteven Whitehouse 11692ab9cd1cSSteven Whitehouse error = -ENOENT; 11702ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11712ab9cd1cSSteven Whitehouse goto out_rgrp; 11722ab9cd1cSSteven Whitehouse 11732ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11742ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11752ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11762ab9cd1cSSteven Whitehouse goto out_rgrp; 11772ab9cd1cSSteven Whitehouse } 11782ab9cd1cSSteven Whitehouse 11792ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 11802ab9cd1cSSteven Whitehouse if (error) 11812ab9cd1cSSteven Whitehouse goto out_rgrp; 11822ab9cd1cSSteven Whitehouse 11832ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11842ab9cd1cSSteven Whitehouse if (error) 11852ab9cd1cSSteven Whitehouse goto out_gunlock; 11862ab9cd1cSSteven Whitehouse 11872ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 11882ab9cd1cSSteven Whitehouse if (error) 11892eb5909dSBob Peterson goto out_gunlock; 11902ab9cd1cSSteven Whitehouse 11914327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 11922ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11932eb5909dSBob Peterson 11942ab9cd1cSSteven Whitehouse out_gunlock: 11952ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11962ab9cd1cSSteven Whitehouse out_rgrp: 11972ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11982ab9cd1cSSteven Whitehouse out_child: 11992ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 12002ab9cd1cSSteven Whitehouse out_parent: 120187654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 120287654896SSteven Whitehouse out_inodes: 120387654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 12042ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 12052ab9cd1cSSteven Whitehouse return error; 12062ab9cd1cSSteven Whitehouse } 12072ab9cd1cSSteven Whitehouse 12082ab9cd1cSSteven Whitehouse /** 12092ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 1210c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12112ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 12122ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 12132ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 12142ab9cd1cSSteven Whitehouse * 12152ab9cd1cSSteven Whitehouse * Returns: errno 12162ab9cd1cSSteven Whitehouse */ 12172ab9cd1cSSteven Whitehouse 1218549c7297SChristian Brauner static int gfs2_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1219549c7297SChristian Brauner struct dentry *dentry, const char *symname) 12202ab9cd1cSSteven Whitehouse { 1221160b4026SSteven Whitehouse unsigned int size; 12222ab9cd1cSSteven Whitehouse 12232ab9cd1cSSteven Whitehouse size = strlen(symname); 1224235628c5SAndreas Gruenbacher if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 12252ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 12262ab9cd1cSSteven Whitehouse 1227b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 12282ab9cd1cSSteven Whitehouse } 12292ab9cd1cSSteven Whitehouse 12302ab9cd1cSSteven Whitehouse /** 12312ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 1232c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12332ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12342ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12352ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12362ab9cd1cSSteven Whitehouse * 12372ab9cd1cSSteven Whitehouse * Returns: errno 12382ab9cd1cSSteven Whitehouse */ 12392ab9cd1cSSteven Whitehouse 1240549c7297SChristian Brauner static int gfs2_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 1241549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 12422ab9cd1cSSteven Whitehouse { 1243235628c5SAndreas Gruenbacher unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1244b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 12452ab9cd1cSSteven Whitehouse } 12462ab9cd1cSSteven Whitehouse 12472ab9cd1cSSteven Whitehouse /** 12482ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 1249c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12502ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12512ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12522ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1253f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12542ab9cd1cSSteven Whitehouse * 12552ab9cd1cSSteven Whitehouse */ 12562ab9cd1cSSteven Whitehouse 1257549c7297SChristian Brauner static int gfs2_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1258549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t dev) 12592ab9cd1cSSteven Whitehouse { 1260b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 12616d4ade98SSteven Whitehouse } 12626d4ade98SSteven Whitehouse 12636d4ade98SSteven Whitehouse /** 12646d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12656d4ade98SSteven Whitehouse * @dir: The directory 12666d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12676d4ade98SSteven Whitehouse * @file: The proposed new struct file 12686d4ade98SSteven Whitehouse * @flags: open flags 12696d4ade98SSteven Whitehouse * @mode: File mode 12706d4ade98SSteven Whitehouse * 12716d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12726d4ade98SSteven Whitehouse */ 12736d4ade98SSteven Whitehouse 12746d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12756d4ade98SSteven Whitehouse struct file *file, unsigned flags, 127644907d79SAl Viro umode_t mode) 12776d4ade98SSteven Whitehouse { 12786d4ade98SSteven Whitehouse struct dentry *d; 12796d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12806d4ade98SSteven Whitehouse 128100699ad8SAl Viro if (!d_in_lookup(dentry)) 12824d93bc3eSAl Viro goto skip_lookup; 12834d93bc3eSAl Viro 1284b452a458SAl Viro d = __gfs2_lookup(dir, dentry, file); 12856d4ade98SSteven Whitehouse if (IS_ERR(d)) 12866d4ade98SSteven Whitehouse return PTR_ERR(d); 12875ca1db41SMiklos Szeredi if (d != NULL) 12885ca1db41SMiklos Szeredi dentry = d; 12892b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1290aad888f8SAl Viro if (!(file->f_mode & FMODE_OPENED)) 1291ec7d879cSAl Viro return finish_no_open(file, d); 12925ca1db41SMiklos Szeredi dput(d); 129321039132SAl Viro return excl && (flags & O_CREAT) ? -EEXIST : 0; 12946d4ade98SSteven Whitehouse } 12956d4ade98SSteven Whitehouse 12965ca1db41SMiklos Szeredi BUG_ON(d != NULL); 12974d93bc3eSAl Viro 12984d93bc3eSAl Viro skip_lookup: 12996d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 13006d4ade98SSteven Whitehouse return -ENOENT; 13016d4ade98SSteven Whitehouse 1302b452a458SAl Viro return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 13032ab9cd1cSSteven Whitehouse } 13042ab9cd1cSSteven Whitehouse 13052ab9cd1cSSteven Whitehouse /* 13062ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 13072ab9cd1cSSteven Whitehouse * @this: move this 13082ab9cd1cSSteven Whitehouse * @to: to here 13092ab9cd1cSSteven Whitehouse * 13102ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 13112ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 13122ab9cd1cSSteven Whitehouse * 13132ab9cd1cSSteven Whitehouse * Returns: errno 13142ab9cd1cSSteven Whitehouse */ 13152ab9cd1cSSteven Whitehouse 13162ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 13172ab9cd1cSSteven Whitehouse { 13182ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 13192ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 13202ab9cd1cSSteven Whitehouse struct inode *tmp; 13212ab9cd1cSSteven Whitehouse int error = 0; 13222ab9cd1cSSteven Whitehouse 13232ab9cd1cSSteven Whitehouse igrab(dir); 13242ab9cd1cSSteven Whitehouse 13252ab9cd1cSSteven Whitehouse for (;;) { 13262ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 13272ab9cd1cSSteven Whitehouse error = -EINVAL; 13282ab9cd1cSSteven Whitehouse break; 13292ab9cd1cSSteven Whitehouse } 13302b0143b5SDavid Howells if (dir == d_inode(sb->s_root)) { 13312ab9cd1cSSteven Whitehouse error = 0; 13322ab9cd1cSSteven Whitehouse break; 13332ab9cd1cSSteven Whitehouse } 13342ab9cd1cSSteven Whitehouse 13352ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 133648f8f711SAbhi Das if (!tmp) { 133748f8f711SAbhi Das error = -ENOENT; 133848f8f711SAbhi Das break; 133948f8f711SAbhi Das } 13402ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13412ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13422ab9cd1cSSteven Whitehouse break; 13432ab9cd1cSSteven Whitehouse } 13442ab9cd1cSSteven Whitehouse 13452ab9cd1cSSteven Whitehouse iput(dir); 13462ab9cd1cSSteven Whitehouse dir = tmp; 13472ab9cd1cSSteven Whitehouse } 13482ab9cd1cSSteven Whitehouse 13492ab9cd1cSSteven Whitehouse iput(dir); 13502ab9cd1cSSteven Whitehouse 13512ab9cd1cSSteven Whitehouse return error; 13522ab9cd1cSSteven Whitehouse } 13532ab9cd1cSSteven Whitehouse 13542ab9cd1cSSteven Whitehouse /** 1355a63b7bbcSBenjamin Marzinski * update_moved_ino - Update an inode that's being moved 1356a63b7bbcSBenjamin Marzinski * @ip: The inode being moved 1357a63b7bbcSBenjamin Marzinski * @ndip: The parent directory of the new filename 1358a63b7bbcSBenjamin Marzinski * @dir_rename: True of ip is a directory 1359a63b7bbcSBenjamin Marzinski * 1360a63b7bbcSBenjamin Marzinski * Returns: errno 1361a63b7bbcSBenjamin Marzinski */ 1362a63b7bbcSBenjamin Marzinski 1363a63b7bbcSBenjamin Marzinski static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1364a63b7bbcSBenjamin Marzinski int dir_rename) 1365a63b7bbcSBenjamin Marzinski { 1366a63b7bbcSBenjamin Marzinski if (dir_rename) 1367a63b7bbcSBenjamin Marzinski return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1368a63b7bbcSBenjamin Marzinski 1369078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 137083998ccdSAndreas Gruenbacher mark_inode_dirty_sync(&ip->i_inode); 1371a63b7bbcSBenjamin Marzinski return 0; 1372a63b7bbcSBenjamin Marzinski } 1373a63b7bbcSBenjamin Marzinski 1374a63b7bbcSBenjamin Marzinski 1375a63b7bbcSBenjamin Marzinski /** 13762ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13772ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13782ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13792ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13802ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13812ab9cd1cSSteven Whitehouse * 13822ab9cd1cSSteven Whitehouse * Returns: errno 13832ab9cd1cSSteven Whitehouse */ 13842ab9cd1cSSteven Whitehouse 13852ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13862ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13872ab9cd1cSSteven Whitehouse { 13882ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 13892ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 13902b0143b5SDavid Howells struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 13912ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 13922ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 1393bc74aaefSBob Peterson struct gfs2_holder ghs[4], r_gh, rd_gh; 13942ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 13952ab9cd1cSSteven Whitehouse unsigned int num_gh; 13962ab9cd1cSSteven Whitehouse int dir_rename = 0; 139719aeb5a6SBob Peterson struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 13982ab9cd1cSSteven Whitehouse unsigned int x; 13992ab9cd1cSSteven Whitehouse int error; 14002ab9cd1cSSteven Whitehouse 14016df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1402bc74aaefSBob Peterson gfs2_holder_mark_uninitialized(&rd_gh); 14032b0143b5SDavid Howells if (d_really_is_positive(ndentry)) { 14042b0143b5SDavid Howells nip = GFS2_I(d_inode(ndentry)); 14052ab9cd1cSSteven Whitehouse if (ip == nip) 14062ab9cd1cSSteven Whitehouse return 0; 14072ab9cd1cSSteven Whitehouse } 14082ab9cd1cSSteven Whitehouse 14095e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 14105e2f7d61SBob Peterson if (error) 14115e2f7d61SBob Peterson return error; 14125e2f7d61SBob Peterson 14132fba46a0SBob Peterson error = gfs2_qa_get(ndip); 14140a305e49SBob Peterson if (error) 14150a305e49SBob Peterson return error; 14160a305e49SBob Peterson 14172ab9cd1cSSteven Whitehouse if (odip != ndip) { 14182ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 14192ab9cd1cSSteven Whitehouse 0, &r_gh); 14202ab9cd1cSSteven Whitehouse if (error) 14212ab9cd1cSSteven Whitehouse goto out; 14222ab9cd1cSSteven Whitehouse 14232ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 14242ab9cd1cSSteven Whitehouse dir_rename = 1; 1425a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 14262ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 14272ab9cd1cSSteven Whitehouse if (error) 14282ab9cd1cSSteven Whitehouse goto out_gunlock_r; 14292ab9cd1cSSteven Whitehouse } 14302ab9cd1cSSteven Whitehouse } 14312ab9cd1cSSteven Whitehouse 14322ab9cd1cSSteven Whitehouse num_gh = 1; 1433ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 14342ab9cd1cSSteven Whitehouse if (odip != ndip) { 1435ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1436ad26967bSBob Peterson ghs + num_gh); 14372ab9cd1cSSteven Whitehouse num_gh++; 14382ab9cd1cSSteven Whitehouse } 1439ad26967bSBob Peterson gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 14402ab9cd1cSSteven Whitehouse num_gh++; 14412ab9cd1cSSteven Whitehouse 14422ab9cd1cSSteven Whitehouse if (nip) { 1443ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1444ad26967bSBob Peterson ghs + num_gh); 14452ab9cd1cSSteven Whitehouse num_gh++; 14462ab9cd1cSSteven Whitehouse } 14472ab9cd1cSSteven Whitehouse 14482ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 14492ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 14502ab9cd1cSSteven Whitehouse if (error) 14512ab9cd1cSSteven Whitehouse goto out_gunlock; 14522ab9cd1cSSteven Whitehouse } 1453ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1454ad26967bSBob Peterson if (error) 1455ad26967bSBob Peterson goto out_gunlock; 14562ab9cd1cSSteven Whitehouse 1457bc74aaefSBob Peterson if (nip) { 1458bc74aaefSBob Peterson /* Grab the resource group glock for unlink flag twiddling. 1459bc74aaefSBob Peterson * This is the case where the target dinode already exists 1460bc74aaefSBob Peterson * so we unlink before doing the rename. 1461bc74aaefSBob Peterson */ 1462bc74aaefSBob Peterson nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1463bc74aaefSBob Peterson if (!nrgd) { 1464bc74aaefSBob Peterson error = -ENOENT; 1465bc74aaefSBob Peterson goto out_gunlock; 1466bc74aaefSBob Peterson } 14674fc7ec31SBob Peterson error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 14684fc7ec31SBob Peterson LM_FLAG_NODE_SCOPE, &rd_gh); 1469bc74aaefSBob Peterson if (error) 1470bc74aaefSBob Peterson goto out_gunlock; 1471bc74aaefSBob Peterson } 1472bc74aaefSBob Peterson 14732ab9cd1cSSteven Whitehouse error = -ENOENT; 14742ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14752ab9cd1cSSteven Whitehouse goto out_gunlock; 14762ab9cd1cSSteven Whitehouse 14772ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14782ab9cd1cSSteven Whitehouse 14792ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14802ab9cd1cSSteven Whitehouse if (error) 14812ab9cd1cSSteven Whitehouse goto out_gunlock; 14822ab9cd1cSSteven Whitehouse 14832ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14842ab9cd1cSSteven Whitehouse 14852ab9cd1cSSteven Whitehouse if (nip) { 14862ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14872ab9cd1cSSteven Whitehouse if (error) 14882ab9cd1cSSteven Whitehouse goto out_gunlock; 14892ab9cd1cSSteven Whitehouse 14902ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 14912ab9cd1cSSteven Whitehouse error = -EAGAIN; 14922ab9cd1cSSteven Whitehouse goto out_gunlock; 14932ab9cd1cSSteven Whitehouse } 14942ab9cd1cSSteven Whitehouse 14952ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 14962ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 14972ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 14982ab9cd1cSSteven Whitehouse error = -EIO; 14992ab9cd1cSSteven Whitehouse goto out_gunlock; 15002ab9cd1cSSteven Whitehouse } 15012ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 15022ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 15032ab9cd1cSSteven Whitehouse goto out_gunlock; 15042ab9cd1cSSteven Whitehouse } 15052ab9cd1cSSteven Whitehouse } 15062ab9cd1cSSteven Whitehouse } else { 1507549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, ndir, 1508549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 15092ab9cd1cSSteven Whitehouse if (error) 15102ab9cd1cSSteven Whitehouse goto out_gunlock; 15112ab9cd1cSSteven Whitehouse 15122ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 15132ab9cd1cSSteven Whitehouse switch (error) { 15142ab9cd1cSSteven Whitehouse case -ENOENT: 15152ab9cd1cSSteven Whitehouse error = 0; 15162ab9cd1cSSteven Whitehouse break; 15172ab9cd1cSSteven Whitehouse case 0: 15182ab9cd1cSSteven Whitehouse error = -EEXIST; 1519e5966cf2SGustavo A. R. Silva goto out_gunlock; 15202ab9cd1cSSteven Whitehouse default: 15212ab9cd1cSSteven Whitehouse goto out_gunlock; 1522098b9c14SAliasgar Surti } 15232ab9cd1cSSteven Whitehouse 15242ab9cd1cSSteven Whitehouse if (odip != ndip) { 15252ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 15262ab9cd1cSSteven Whitehouse error = -ENOENT; 15272ab9cd1cSSteven Whitehouse goto out_gunlock; 15282ab9cd1cSSteven Whitehouse } 15292ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 15302ab9cd1cSSteven Whitehouse error = -EFBIG; 15312ab9cd1cSSteven Whitehouse goto out_gunlock; 15322ab9cd1cSSteven Whitehouse } 15332ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 15342ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 15352ab9cd1cSSteven Whitehouse error = -EMLINK; 15362ab9cd1cSSteven Whitehouse goto out_gunlock; 15372ab9cd1cSSteven Whitehouse } 15382ab9cd1cSSteven Whitehouse } 15392ab9cd1cSSteven Whitehouse } 15402ab9cd1cSSteven Whitehouse 15412ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 15422ab9cd1cSSteven Whitehouse 15432ab9cd1cSSteven Whitehouse if (dir_rename) { 1544549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, d_inode(odentry), 1545549c7297SChristian Brauner MAY_WRITE); 15462ab9cd1cSSteven Whitehouse if (error) 15472ab9cd1cSSteven Whitehouse goto out_gunlock; 15482ab9cd1cSSteven Whitehouse } 15492ab9cd1cSSteven Whitehouse 15503c1c0ae1SSteven Whitehouse if (nip == NULL) { 15513c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 15523c1c0ae1SSteven Whitehouse if (error) 15532ab9cd1cSSteven Whitehouse goto out_gunlock; 15543c1c0ae1SSteven Whitehouse } 15552ab9cd1cSSteven Whitehouse 15563c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 15573c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1558b8fbf471SAbhi Das error = gfs2_quota_lock_check(ndip, &ap); 15592ab9cd1cSSteven Whitehouse if (error) 15605407e242SBob Peterson goto out_gunlock; 15612ab9cd1cSSteven Whitehouse 15627b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 15632ab9cd1cSSteven Whitehouse if (error) 15642ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15652ab9cd1cSSteven Whitehouse 1566534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1567534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 15682ab9cd1cSSteven Whitehouse if (error) 15692ab9cd1cSSteven Whitehouse goto out_ipreserv; 15702ab9cd1cSSteven Whitehouse } else { 15712ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 15722ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 15732ab9cd1cSSteven Whitehouse if (error) 15742ab9cd1cSSteven Whitehouse goto out_gunlock; 15752ab9cd1cSSteven Whitehouse } 15762ab9cd1cSSteven Whitehouse 15772ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15782ab9cd1cSSteven Whitehouse 15794327a9bfSBob Peterson if (nip) 15804327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15812ab9cd1cSSteven Whitehouse 1582a63b7bbcSBenjamin Marzinski error = update_moved_ino(ip, ndip, dir_rename); 15832ab9cd1cSSteven Whitehouse if (error) 15842ab9cd1cSSteven Whitehouse goto out_end_trans; 15852ab9cd1cSSteven Whitehouse 15862ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15872ab9cd1cSSteven Whitehouse if (error) 15882ab9cd1cSSteven Whitehouse goto out_end_trans; 15892ab9cd1cSSteven Whitehouse 15902b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 15912ab9cd1cSSteven Whitehouse if (error) 15922ab9cd1cSSteven Whitehouse goto out_end_trans; 15932ab9cd1cSSteven Whitehouse 15942ab9cd1cSSteven Whitehouse out_end_trans: 15952ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 15962ab9cd1cSSteven Whitehouse out_ipreserv: 15973c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15982ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 15992ab9cd1cSSteven Whitehouse out_gunlock_q: 16003c1c0ae1SSteven Whitehouse if (da.nr_blocks) 16012ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 16022ab9cd1cSSteven Whitehouse out_gunlock: 16032b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1604bc74aaefSBob Peterson if (gfs2_holder_initialized(&rd_gh)) 1605bc74aaefSBob Peterson gfs2_glock_dq_uninit(&rd_gh); 1606bc74aaefSBob Peterson 16072ab9cd1cSSteven Whitehouse while (x--) { 1608ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 16092ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 16102ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 16112ab9cd1cSSteven Whitehouse } 16122ab9cd1cSSteven Whitehouse out_gunlock_r: 16136df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 16142ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 16152ab9cd1cSSteven Whitehouse out: 16162fba46a0SBob Peterson gfs2_qa_put(ndip); 16172ab9cd1cSSteven Whitehouse return error; 16182ab9cd1cSSteven Whitehouse } 16192ab9cd1cSSteven Whitehouse 16202ab9cd1cSSteven Whitehouse /** 1621a63b7bbcSBenjamin Marzinski * gfs2_exchange - exchange two files 1622a63b7bbcSBenjamin Marzinski * @odir: Parent directory of old file name 1623a63b7bbcSBenjamin Marzinski * @odentry: The old dentry of the file 1624a63b7bbcSBenjamin Marzinski * @ndir: Parent directory of new file name 1625a63b7bbcSBenjamin Marzinski * @ndentry: The new dentry of the file 1626a63b7bbcSBenjamin Marzinski * @flags: The rename flags 1627a63b7bbcSBenjamin Marzinski * 1628a63b7bbcSBenjamin Marzinski * Returns: errno 1629a63b7bbcSBenjamin Marzinski */ 1630a63b7bbcSBenjamin Marzinski 1631a63b7bbcSBenjamin Marzinski static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1632a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1633a63b7bbcSBenjamin Marzinski unsigned int flags) 1634a63b7bbcSBenjamin Marzinski { 1635a63b7bbcSBenjamin Marzinski struct gfs2_inode *odip = GFS2_I(odir); 1636a63b7bbcSBenjamin Marzinski struct gfs2_inode *ndip = GFS2_I(ndir); 1637a63b7bbcSBenjamin Marzinski struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1638a63b7bbcSBenjamin Marzinski struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1639a63b7bbcSBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(odir); 1640ad26967bSBob Peterson struct gfs2_holder ghs[4], r_gh; 1641a63b7bbcSBenjamin Marzinski unsigned int num_gh; 1642a63b7bbcSBenjamin Marzinski unsigned int x; 1643a63b7bbcSBenjamin Marzinski umode_t old_mode = oip->i_inode.i_mode; 1644a63b7bbcSBenjamin Marzinski umode_t new_mode = nip->i_inode.i_mode; 1645a63b7bbcSBenjamin Marzinski int error; 1646a63b7bbcSBenjamin Marzinski 16476df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1648a63b7bbcSBenjamin Marzinski error = gfs2_rindex_update(sdp); 1649a63b7bbcSBenjamin Marzinski if (error) 1650a63b7bbcSBenjamin Marzinski return error; 1651a63b7bbcSBenjamin Marzinski 1652a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1653a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1654a63b7bbcSBenjamin Marzinski 0, &r_gh); 1655a63b7bbcSBenjamin Marzinski if (error) 1656a63b7bbcSBenjamin Marzinski goto out; 1657a63b7bbcSBenjamin Marzinski 1658a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1659a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1660a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(oip, ndip); 1661a63b7bbcSBenjamin Marzinski if (error) 1662a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1663a63b7bbcSBenjamin Marzinski } 1664a63b7bbcSBenjamin Marzinski 1665a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1666a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1667a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(nip, odip); 1668a63b7bbcSBenjamin Marzinski if (error) 1669a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1670a63b7bbcSBenjamin Marzinski } 1671a63b7bbcSBenjamin Marzinski } 1672a63b7bbcSBenjamin Marzinski 1673a63b7bbcSBenjamin Marzinski num_gh = 1; 1674ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1675a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1676ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1677ad26967bSBob Peterson ghs + num_gh); 1678a63b7bbcSBenjamin Marzinski num_gh++; 1679a63b7bbcSBenjamin Marzinski } 1680ad26967bSBob Peterson gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1681a63b7bbcSBenjamin Marzinski num_gh++; 1682a63b7bbcSBenjamin Marzinski 1683ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1684a63b7bbcSBenjamin Marzinski num_gh++; 1685a63b7bbcSBenjamin Marzinski 1686a63b7bbcSBenjamin Marzinski for (x = 0; x < num_gh; x++) { 1687a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq(ghs + x); 1688a63b7bbcSBenjamin Marzinski if (error) 1689a63b7bbcSBenjamin Marzinski goto out_gunlock; 1690a63b7bbcSBenjamin Marzinski } 1691a63b7bbcSBenjamin Marzinski 1692ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1693ad26967bSBob Peterson if (error) 1694ad26967bSBob Peterson goto out_gunlock; 1695ad26967bSBob Peterson 1696a63b7bbcSBenjamin Marzinski error = -ENOENT; 1697a63b7bbcSBenjamin Marzinski if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1698a63b7bbcSBenjamin Marzinski goto out_gunlock; 1699a63b7bbcSBenjamin Marzinski 1700a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1701a63b7bbcSBenjamin Marzinski if (error) 1702a63b7bbcSBenjamin Marzinski goto out_gunlock; 1703a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1704a63b7bbcSBenjamin Marzinski if (error) 1705a63b7bbcSBenjamin Marzinski goto out_gunlock; 1706a63b7bbcSBenjamin Marzinski 1707a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1708549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, odentry->d_inode, 1709549c7297SChristian Brauner MAY_WRITE); 1710a63b7bbcSBenjamin Marzinski if (error) 1711a63b7bbcSBenjamin Marzinski goto out_gunlock; 1712a63b7bbcSBenjamin Marzinski } 1713a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1714549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, ndentry->d_inode, 1715549c7297SChristian Brauner MAY_WRITE); 1716a63b7bbcSBenjamin Marzinski if (error) 1717a63b7bbcSBenjamin Marzinski goto out_gunlock; 1718a63b7bbcSBenjamin Marzinski } 1719a63b7bbcSBenjamin Marzinski error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1720a63b7bbcSBenjamin Marzinski if (error) 1721a63b7bbcSBenjamin Marzinski goto out_gunlock; 1722a63b7bbcSBenjamin Marzinski 1723a63b7bbcSBenjamin Marzinski error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1724a63b7bbcSBenjamin Marzinski if (error) 1725a63b7bbcSBenjamin Marzinski goto out_end_trans; 1726a63b7bbcSBenjamin Marzinski 1727a63b7bbcSBenjamin Marzinski error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1728a63b7bbcSBenjamin Marzinski if (error) 1729a63b7bbcSBenjamin Marzinski goto out_end_trans; 1730a63b7bbcSBenjamin Marzinski 1731a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1732a63b7bbcSBenjamin Marzinski IF2DT(old_mode)); 1733a63b7bbcSBenjamin Marzinski if (error) 1734a63b7bbcSBenjamin Marzinski goto out_end_trans; 1735a63b7bbcSBenjamin Marzinski 1736a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1737a63b7bbcSBenjamin Marzinski IF2DT(new_mode)); 1738a63b7bbcSBenjamin Marzinski if (error) 1739a63b7bbcSBenjamin Marzinski goto out_end_trans; 1740a63b7bbcSBenjamin Marzinski 1741a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1742a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1743a63b7bbcSBenjamin Marzinski inc_nlink(&odip->i_inode); 1744a63b7bbcSBenjamin Marzinski drop_nlink(&ndip->i_inode); 1745a63b7bbcSBenjamin Marzinski } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1746a63b7bbcSBenjamin Marzinski inc_nlink(&ndip->i_inode); 1747a63b7bbcSBenjamin Marzinski drop_nlink(&odip->i_inode); 1748a63b7bbcSBenjamin Marzinski } 1749a63b7bbcSBenjamin Marzinski } 1750a63b7bbcSBenjamin Marzinski mark_inode_dirty(&ndip->i_inode); 1751a63b7bbcSBenjamin Marzinski if (odip != ndip) 1752a63b7bbcSBenjamin Marzinski mark_inode_dirty(&odip->i_inode); 1753a63b7bbcSBenjamin Marzinski 1754a63b7bbcSBenjamin Marzinski out_end_trans: 1755a63b7bbcSBenjamin Marzinski gfs2_trans_end(sdp); 1756a63b7bbcSBenjamin Marzinski out_gunlock: 1757a63b7bbcSBenjamin Marzinski while (x--) { 1758ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 1759a63b7bbcSBenjamin Marzinski gfs2_glock_dq(ghs + x); 1760a63b7bbcSBenjamin Marzinski gfs2_holder_uninit(ghs + x); 1761a63b7bbcSBenjamin Marzinski } 1762a63b7bbcSBenjamin Marzinski out_gunlock_r: 17636df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 1764a63b7bbcSBenjamin Marzinski gfs2_glock_dq_uninit(&r_gh); 1765a63b7bbcSBenjamin Marzinski out: 1766a63b7bbcSBenjamin Marzinski return error; 1767a63b7bbcSBenjamin Marzinski } 1768a63b7bbcSBenjamin Marzinski 1769549c7297SChristian Brauner static int gfs2_rename2(struct user_namespace *mnt_userns, struct inode *odir, 1770549c7297SChristian Brauner struct dentry *odentry, struct inode *ndir, 1771549c7297SChristian Brauner struct dentry *ndentry, unsigned int flags) 1772a63b7bbcSBenjamin Marzinski { 1773a63b7bbcSBenjamin Marzinski flags &= ~RENAME_NOREPLACE; 1774a63b7bbcSBenjamin Marzinski 1775a63b7bbcSBenjamin Marzinski if (flags & ~RENAME_EXCHANGE) 1776a63b7bbcSBenjamin Marzinski return -EINVAL; 1777a63b7bbcSBenjamin Marzinski 1778a63b7bbcSBenjamin Marzinski if (flags & RENAME_EXCHANGE) 1779a63b7bbcSBenjamin Marzinski return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1780a63b7bbcSBenjamin Marzinski 1781a63b7bbcSBenjamin Marzinski return gfs2_rename(odir, odentry, ndir, ndentry); 1782a63b7bbcSBenjamin Marzinski } 1783a63b7bbcSBenjamin Marzinski 1784a63b7bbcSBenjamin Marzinski /** 17856b255391SAl Viro * gfs2_get_link - Follow a symbolic link 17862ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 17876b255391SAl Viro * @inode: The inode of the link 1788fceef393SAl Viro * @done: destructor for return value 17892ab9cd1cSSteven Whitehouse * 17902ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 17912ab9cd1cSSteven Whitehouse * 17922ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 17932ab9cd1cSSteven Whitehouse */ 17942ab9cd1cSSteven Whitehouse 17956b255391SAl Viro static const char *gfs2_get_link(struct dentry *dentry, 1796fceef393SAl Viro struct inode *inode, 1797fceef393SAl Viro struct delayed_call *done) 17982ab9cd1cSSteven Whitehouse { 17996b255391SAl Viro struct gfs2_inode *ip = GFS2_I(inode); 18002ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18012ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1802160b4026SSteven Whitehouse unsigned int size; 18032ab9cd1cSSteven Whitehouse char *buf; 18042ab9cd1cSSteven Whitehouse int error; 18052ab9cd1cSSteven Whitehouse 18066b255391SAl Viro if (!dentry) 18076b255391SAl Viro return ERR_PTR(-ECHILD); 18086b255391SAl Viro 18092ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 18102ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 18112ab9cd1cSSteven Whitehouse if (error) { 18122ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 1813680baacbSAl Viro return ERR_PTR(error); 18142ab9cd1cSSteven Whitehouse } 18152ab9cd1cSSteven Whitehouse 18162ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 18172ab9cd1cSSteven Whitehouse if (size == 0) { 18182ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 18192ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 18202ab9cd1cSSteven Whitehouse goto out; 18212ab9cd1cSSteven Whitehouse } 18222ab9cd1cSSteven Whitehouse 18232ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 18242ab9cd1cSSteven Whitehouse if (error) { 18252ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 18262ab9cd1cSSteven Whitehouse goto out; 18272ab9cd1cSSteven Whitehouse } 18282ab9cd1cSSteven Whitehouse 1829160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 18302ab9cd1cSSteven Whitehouse if (!buf) 18312ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 18322ab9cd1cSSteven Whitehouse else 1833160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 18342ab9cd1cSSteven Whitehouse brelse(dibh); 18352ab9cd1cSSteven Whitehouse out: 18362ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 1837680baacbSAl Viro if (!IS_ERR(buf)) 1838fceef393SAl Viro set_delayed_call(done, kfree_link, buf); 1839680baacbSAl Viro return buf; 18402ab9cd1cSSteven Whitehouse } 18412ab9cd1cSSteven Whitehouse 18422ab9cd1cSSteven Whitehouse /** 1843c551f66cSLee Jones * gfs2_permission 1844c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 18452ab9cd1cSSteven Whitehouse * @inode: The inode 18462ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 18472ab9cd1cSSteven Whitehouse * 18482ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18492ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18502ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 18512ab9cd1cSSteven Whitehouse * 18522ab9cd1cSSteven Whitehouse * Returns: errno 18532ab9cd1cSSteven Whitehouse */ 18542ab9cd1cSSteven Whitehouse 1855549c7297SChristian Brauner int gfs2_permission(struct user_namespace *mnt_userns, struct inode *inode, 1856549c7297SChristian Brauner int mask) 18572ab9cd1cSSteven Whitehouse { 18582ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 18592ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18602ab9cd1cSSteven Whitehouse int error; 18612ab9cd1cSSteven Whitehouse 18626df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 18632ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 18642ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 186510556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 18662ab9cd1cSSteven Whitehouse return -ECHILD; 18672ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 18682ab9cd1cSSteven Whitehouse if (error) 18692ab9cd1cSSteven Whitehouse return error; 18702ab9cd1cSSteven Whitehouse } 18712ab9cd1cSSteven Whitehouse 18722ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1873337684a1SEryu Guan error = -EPERM; 18742ab9cd1cSSteven Whitehouse else 187547291baaSChristian Brauner error = generic_permission(&init_user_ns, inode, mask); 18766df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 18772ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 18782ab9cd1cSSteven Whitehouse 18792ab9cd1cSSteven Whitehouse return error; 18802ab9cd1cSSteven Whitehouse } 18812ab9cd1cSSteven Whitehouse 1882ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18832ab9cd1cSSteven Whitehouse { 1884*c1632a0fSChristian Brauner setattr_copy(&nop_mnt_idmap, inode, attr); 18852ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 18862ab9cd1cSSteven Whitehouse return 0; 18872ab9cd1cSSteven Whitehouse } 18882ab9cd1cSSteven Whitehouse 1889a4122a95SAndreas Gruenbacher static int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18902ab9cd1cSSteven Whitehouse { 18912ab9cd1cSSteven Whitehouse int error; 18922ab9cd1cSSteven Whitehouse 18932ab9cd1cSSteven Whitehouse if (current->journal_info) 1894ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 18952ab9cd1cSSteven Whitehouse 1896ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 18972ab9cd1cSSteven Whitehouse if (error) 18982ab9cd1cSSteven Whitehouse return error; 18992ab9cd1cSSteven Whitehouse 1900ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1901ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 19022ab9cd1cSSteven Whitehouse return error; 19032ab9cd1cSSteven Whitehouse } 19042ab9cd1cSSteven Whitehouse 19052ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 19062ab9cd1cSSteven Whitehouse { 19072ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19082ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 19097c06b5d6SEric W. Biederman kuid_t ouid, nuid; 19107c06b5d6SEric W. Biederman kgid_t ogid, ngid; 19112ab9cd1cSSteven Whitehouse int error; 1912b8fbf471SAbhi Das struct gfs2_alloc_parms ap; 19132ab9cd1cSSteven Whitehouse 19142ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 19152ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 19162ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 19172ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 19182ab9cd1cSSteven Whitehouse 19196b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1920f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 19216b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1922f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 19232fba46a0SBob Peterson error = gfs2_qa_get(ip); 192462e96cf8SBob Peterson if (error) 19252fba46a0SBob Peterson return error; 192662e96cf8SBob Peterson 192762e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 192862e96cf8SBob Peterson if (error) 192962e96cf8SBob Peterson goto out; 193062e96cf8SBob Peterson 193162e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 193262e96cf8SBob Peterson if (error) 193362e96cf8SBob Peterson goto out; 193462e96cf8SBob Peterson 1935b8fbf471SAbhi Das ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1936b8fbf471SAbhi Das 19376b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19386b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1939b8fbf471SAbhi Das error = gfs2_quota_check(ip, nuid, ngid, &ap); 19402ab9cd1cSSteven Whitehouse if (error) 19412ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19422ab9cd1cSSteven Whitehouse } 19432ab9cd1cSSteven Whitehouse 19442ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 19452ab9cd1cSSteven Whitehouse if (error) 19462ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19472ab9cd1cSSteven Whitehouse 1948ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 19492ab9cd1cSSteven Whitehouse if (error) 19502ab9cd1cSSteven Whitehouse goto out_end_trans; 19512ab9cd1cSSteven Whitehouse 19526b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19536b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 195439a72580SAbhi Das gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1955b8fbf471SAbhi Das gfs2_quota_change(ip, ap.target, nuid, ngid); 19562ab9cd1cSSteven Whitehouse } 19572ab9cd1cSSteven Whitehouse 19582ab9cd1cSSteven Whitehouse out_end_trans: 19592ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 19602ab9cd1cSSteven Whitehouse out_gunlock_q: 19612ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 196262e96cf8SBob Peterson out: 19632fba46a0SBob Peterson gfs2_qa_put(ip); 19642ab9cd1cSSteven Whitehouse return error; 19652ab9cd1cSSteven Whitehouse } 19662ab9cd1cSSteven Whitehouse 19672ab9cd1cSSteven Whitehouse /** 19682ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 1969*c1632a0fSChristian Brauner * @idmap: idmap of the mount the inode was found from 19702ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 19712ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 19722ab9cd1cSSteven Whitehouse * 19732ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 19742ab9cd1cSSteven Whitehouse * that change out to disk. 19752ab9cd1cSSteven Whitehouse * 19762ab9cd1cSSteven Whitehouse * Returns: errno 19772ab9cd1cSSteven Whitehouse */ 19782ab9cd1cSSteven Whitehouse 1979*c1632a0fSChristian Brauner static int gfs2_setattr(struct mnt_idmap *idmap, 1980549c7297SChristian Brauner struct dentry *dentry, struct iattr *attr) 19812ab9cd1cSSteven Whitehouse { 19822b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 19832ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19842ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 19852ab9cd1cSSteven Whitehouse int error; 19862ab9cd1cSSteven Whitehouse 19872fba46a0SBob Peterson error = gfs2_qa_get(ip); 19880a305e49SBob Peterson if (error) 19890a305e49SBob Peterson return error; 19900a305e49SBob Peterson 19912ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 19922ab9cd1cSSteven Whitehouse if (error) 19932fba46a0SBob Peterson goto out; 19942ab9cd1cSSteven Whitehouse 1995d75b9fa0SAndreas Gruenbacher error = may_setattr(&init_user_ns, inode, attr->ia_valid); 1996d75b9fa0SAndreas Gruenbacher if (error) 19972fba46a0SBob Peterson goto error; 19982ab9cd1cSSteven Whitehouse 1999*c1632a0fSChristian Brauner error = setattr_prepare(&nop_mnt_idmap, dentry, attr); 20002ab9cd1cSSteven Whitehouse if (error) 20012fba46a0SBob Peterson goto error; 20022ab9cd1cSSteven Whitehouse 20032ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 20042ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 20052ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 20062ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 2007e01580bfSChristoph Hellwig else { 2008ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 2009e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 2010138060baSChristian Brauner error = posix_acl_chmod(&init_user_ns, dentry, 2011e65ce2a5SChristian Brauner inode->i_mode); 2012e01580bfSChristoph Hellwig } 20132ab9cd1cSSteven Whitehouse 20142fba46a0SBob Peterson error: 20152ab9cd1cSSteven Whitehouse if (!error) 20162ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 2017ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 20182fba46a0SBob Peterson out: 20192fba46a0SBob Peterson gfs2_qa_put(ip); 20202ab9cd1cSSteven Whitehouse return error; 20212ab9cd1cSSteven Whitehouse } 20222ab9cd1cSSteven Whitehouse 20232ab9cd1cSSteven Whitehouse /** 20242ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 2025549c7297SChristian Brauner * @mnt_userns: user namespace of the mount the inode was found from 2026a528d35eSDavid Howells * @path: Object to query 20272ab9cd1cSSteven Whitehouse * @stat: The inode's stats 2028a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 2029a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 20302ab9cd1cSSteven Whitehouse * 20312ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 20322ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 20332ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 20342ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 20352ab9cd1cSSteven Whitehouse * with the glock already held. 20362ab9cd1cSSteven Whitehouse * 20372ab9cd1cSSteven Whitehouse * Returns: errno 20382ab9cd1cSSteven Whitehouse */ 20392ab9cd1cSSteven Whitehouse 2040549c7297SChristian Brauner static int gfs2_getattr(struct user_namespace *mnt_userns, 2041549c7297SChristian Brauner const struct path *path, struct kstat *stat, 2042a528d35eSDavid Howells u32 request_mask, unsigned int flags) 20432ab9cd1cSSteven Whitehouse { 2044a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 20452ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20462ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 2047b2623c2fSAndreas Gruenbacher u32 gfsflags; 20482ab9cd1cSSteven Whitehouse int error; 20492ab9cd1cSSteven Whitehouse 20506df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 20512ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 20522ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 20532ab9cd1cSSteven Whitehouse if (error) 20542ab9cd1cSSteven Whitehouse return error; 20552ab9cd1cSSteven Whitehouse } 20562ab9cd1cSSteven Whitehouse 2057b2623c2fSAndreas Gruenbacher gfsflags = ip->i_diskflags; 2058b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_APPENDONLY) 2059b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_APPEND; 2060b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_IMMUTABLE) 2061b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_IMMUTABLE; 2062b2623c2fSAndreas Gruenbacher 2063b2623c2fSAndreas Gruenbacher stat->attributes_mask |= (STATX_ATTR_APPEND | 2064b2623c2fSAndreas Gruenbacher STATX_ATTR_COMPRESSED | 2065b2623c2fSAndreas Gruenbacher STATX_ATTR_ENCRYPTED | 2066b2623c2fSAndreas Gruenbacher STATX_ATTR_IMMUTABLE | 2067b2623c2fSAndreas Gruenbacher STATX_ATTR_NODUMP); 2068b2623c2fSAndreas Gruenbacher 20690d56a451SChristian Brauner generic_fillattr(&init_user_ns, inode, stat); 2070b2623c2fSAndreas Gruenbacher 20716df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 20722ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 20732ab9cd1cSSteven Whitehouse 20742ab9cd1cSSteven Whitehouse return 0; 20752ab9cd1cSSteven Whitehouse } 20762ab9cd1cSSteven Whitehouse 20772ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 20782ab9cd1cSSteven Whitehouse u64 start, u64 len) 20792ab9cd1cSSteven Whitehouse { 20802ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20812ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 20822ab9cd1cSSteven Whitehouse int ret; 20832ab9cd1cSSteven Whitehouse 2084aac1a55bSBob Peterson inode_lock_shared(inode); 20852ab9cd1cSSteven Whitehouse 20862ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20872ab9cd1cSSteven Whitehouse if (ret) 20882ab9cd1cSSteven Whitehouse goto out; 20892ab9cd1cSSteven Whitehouse 2090aac1a55bSBob Peterson ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 20912ab9cd1cSSteven Whitehouse 20922ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 2093aac1a55bSBob Peterson 20942ab9cd1cSSteven Whitehouse out: 2095aac1a55bSBob Peterson inode_unlock_shared(inode); 20962ab9cd1cSSteven Whitehouse return ret; 20972ab9cd1cSSteven Whitehouse } 20982ab9cd1cSSteven Whitehouse 20993a27411cSAndreas Gruenbacher loff_t gfs2_seek_data(struct file *file, loff_t offset) 21003a27411cSAndreas Gruenbacher { 21013a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21023a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21033a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21043a27411cSAndreas Gruenbacher loff_t ret; 21053a27411cSAndreas Gruenbacher 21063a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21073a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21083a27411cSAndreas Gruenbacher if (!ret) 21093a27411cSAndreas Gruenbacher ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 21103a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21113a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21123a27411cSAndreas Gruenbacher 21133a27411cSAndreas Gruenbacher if (ret < 0) 21143a27411cSAndreas Gruenbacher return ret; 21153a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21163a27411cSAndreas Gruenbacher } 21173a27411cSAndreas Gruenbacher 21183a27411cSAndreas Gruenbacher loff_t gfs2_seek_hole(struct file *file, loff_t offset) 21193a27411cSAndreas Gruenbacher { 21203a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21213a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21223a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21233a27411cSAndreas Gruenbacher loff_t ret; 21243a27411cSAndreas Gruenbacher 21253a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21263a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21273a27411cSAndreas Gruenbacher if (!ret) 21283a27411cSAndreas Gruenbacher ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 21293a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21303a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21313a27411cSAndreas Gruenbacher 21323a27411cSAndreas Gruenbacher if (ret < 0) 21333a27411cSAndreas Gruenbacher return ret; 21343a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21353a27411cSAndreas Gruenbacher } 21363a27411cSAndreas Gruenbacher 213782e938bdSAndreas Gruenbacher static int gfs2_update_time(struct inode *inode, struct timespec64 *time, 213882e938bdSAndreas Gruenbacher int flags) 213982e938bdSAndreas Gruenbacher { 214082e938bdSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 214182e938bdSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_gl; 214282e938bdSAndreas Gruenbacher struct gfs2_holder *gh; 214382e938bdSAndreas Gruenbacher int error; 214482e938bdSAndreas Gruenbacher 214582e938bdSAndreas Gruenbacher gh = gfs2_glock_is_locked_by_me(gl); 214682e938bdSAndreas Gruenbacher if (gh && !gfs2_glock_is_held_excl(gl)) { 214782e938bdSAndreas Gruenbacher gfs2_glock_dq(gh); 214882e938bdSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); 214982e938bdSAndreas Gruenbacher error = gfs2_glock_nq(gh); 215082e938bdSAndreas Gruenbacher if (error) 215182e938bdSAndreas Gruenbacher return error; 215282e938bdSAndreas Gruenbacher } 215382e938bdSAndreas Gruenbacher return generic_update_time(inode, time, flags); 215482e938bdSAndreas Gruenbacher } 215582e938bdSAndreas Gruenbacher 2156e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops = { 21572ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21582ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21592ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21602ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21612ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2162cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2163e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 216482e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 216588b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 216688b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21672ab9cd1cSSteven Whitehouse }; 21682ab9cd1cSSteven Whitehouse 2169e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops = { 21702ab9cd1cSSteven Whitehouse .create = gfs2_create, 21712ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 21722ab9cd1cSSteven Whitehouse .link = gfs2_link, 21732ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 21742ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 21752ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 21762ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 21772ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 21782773bf00SMiklos Szeredi .rename = gfs2_rename2, 21792ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21802ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21812ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21822ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21832ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2184cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2185e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 218682e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21876d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 218888b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 218988b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21902ab9cd1cSSteven Whitehouse }; 21912ab9cd1cSSteven Whitehouse 2192e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops = { 21936b255391SAl Viro .get_link = gfs2_get_link, 21942ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21952ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21962ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21972ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21982ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21992ab9cd1cSSteven Whitehouse }; 22002ab9cd1cSSteven Whitehouse 2201