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 43cda9dd42SAndreas Gruenbacher static int iget_test(struct inode *inode, void *opaque) 442ab9cd1cSSteven Whitehouse { 45cda9dd42SAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 46cda9dd42SAndreas Gruenbacher 47cda9dd42SAndreas Gruenbacher return GFS2_I(inode)->i_no_addr == no_addr; 48cda9dd42SAndreas Gruenbacher } 49cda9dd42SAndreas Gruenbacher 50cda9dd42SAndreas Gruenbacher static int iget_set(struct inode *inode, void *opaque) 51cda9dd42SAndreas Gruenbacher { 52cda9dd42SAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 53cda9dd42SAndreas Gruenbacher 54cda9dd42SAndreas Gruenbacher GFS2_I(inode)->i_no_addr = no_addr; 55cda9dd42SAndreas Gruenbacher inode->i_ino = no_addr; 56cda9dd42SAndreas Gruenbacher return 0; 57cda9dd42SAndreas Gruenbacher } 58cda9dd42SAndreas Gruenbacher 593ce37b2cSAndreas Gruenbacher static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) 603ce37b2cSAndreas Gruenbacher { 613ce37b2cSAndreas Gruenbacher struct inode *inode; 623ce37b2cSAndreas Gruenbacher 633ce37b2cSAndreas Gruenbacher repeat: 64cda9dd42SAndreas Gruenbacher inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 653ce37b2cSAndreas Gruenbacher if (!inode) 663ce37b2cSAndreas Gruenbacher return inode; 673ce37b2cSAndreas Gruenbacher if (is_bad_inode(inode)) { 683ce37b2cSAndreas Gruenbacher iput(inode); 693ce37b2cSAndreas Gruenbacher goto repeat; 703ce37b2cSAndreas Gruenbacher } 713ce37b2cSAndreas Gruenbacher return inode; 722ab9cd1cSSteven Whitehouse } 732ab9cd1cSSteven Whitehouse 742ab9cd1cSSteven Whitehouse /** 752ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 762ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 772ab9cd1cSSteven Whitehouse * 782ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 792ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 802ab9cd1cSSteven Whitehouse */ 812ab9cd1cSSteven Whitehouse 822ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 832ab9cd1cSSteven Whitehouse { 842ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 852ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 862ab9cd1cSSteven Whitehouse 872ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 882ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 892ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 902ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 912ab9cd1cSSteven Whitehouse else 922ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 932ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 942ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 952ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 962ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 972ab9cd1cSSteven Whitehouse else 982ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 992ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 1002ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 1012ab9cd1cSSteven Whitehouse } else { 1022ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1032ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 1042ab9cd1cSSteven Whitehouse } 1052ab9cd1cSSteven Whitehouse } 1062ab9cd1cSSteven Whitehouse 1072ab9cd1cSSteven Whitehouse /** 1082ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 1092ab9cd1cSSteven Whitehouse * @sb: The super block 1102ab9cd1cSSteven Whitehouse * @type: The type of the inode 1113ce37b2cSAndreas Gruenbacher * @no_addr: The inode number 1123ce37b2cSAndreas Gruenbacher * @no_formal_ino: The inode generation number 1133ce37b2cSAndreas Gruenbacher * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 11461b91cfdSAndreas Gruenbacher * GFS2_BLKST_FREE to indicate not to verify) 1153ce37b2cSAndreas Gruenbacher * 1163ce37b2cSAndreas Gruenbacher * If @type is DT_UNKNOWN, the inode type is fetched from disk. 1173ce37b2cSAndreas Gruenbacher * 1183ce37b2cSAndreas Gruenbacher * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 1193ce37b2cSAndreas Gruenbacher * placeholder because it doesn't otherwise make sense), the on-disk block type 1203ce37b2cSAndreas Gruenbacher * is verified to be @blktype. 1212ab9cd1cSSteven Whitehouse * 122b66648adSAndreas Gruenbacher * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE) 123b66648adSAndreas Gruenbacher * if it detects that @no_formal_ino doesn't match the actual inode generation 124b66648adSAndreas Gruenbacher * number. However, it doesn't always know unless @type is DT_UNKNOWN. 125b66648adSAndreas Gruenbacher * 1262ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1272ab9cd1cSSteven Whitehouse */ 1282ab9cd1cSSteven Whitehouse 1292ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1303ce37b2cSAndreas Gruenbacher u64 no_addr, u64 no_formal_ino, 1313ce37b2cSAndreas Gruenbacher unsigned int blktype) 1322ab9cd1cSSteven Whitehouse { 1332ab9cd1cSSteven Whitehouse struct inode *inode; 1342ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1352ab9cd1cSSteven Whitehouse struct gfs2_glock *io_gl = NULL; 1363ce37b2cSAndreas Gruenbacher struct gfs2_holder i_gh; 1372ab9cd1cSSteven Whitehouse int error; 1382ab9cd1cSSteven Whitehouse 1396df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 1403ce37b2cSAndreas Gruenbacher inode = gfs2_iget(sb, no_addr); 1412ab9cd1cSSteven Whitehouse if (!inode) 142ac3beb6aSSteven Whitehouse return ERR_PTR(-ENOMEM); 1432ab9cd1cSSteven Whitehouse 144e97321faSBob Peterson ip = GFS2_I(inode); 145e97321faSBob Peterson 1462ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1472ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1482ab9cd1cSSteven Whitehouse 1492ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 1502ab9cd1cSSteven Whitehouse if (unlikely(error)) 1512ab9cd1cSSteven Whitehouse goto fail; 1524fd1a579SAndreas Gruenbacher flush_delayed_work(&ip->i_gl->gl_work); 1532ab9cd1cSSteven Whitehouse 1542ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 1552ab9cd1cSSteven Whitehouse if (unlikely(error)) 15640e7e86eSAndreas Gruenbacher goto fail; 157dd0ecf54SAndreas Gruenbacher if (blktype != GFS2_BLKST_UNLINKED) 158dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 1592ab9cd1cSSteven Whitehouse 1603ce37b2cSAndreas Gruenbacher if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 1613ce37b2cSAndreas Gruenbacher /* 1623ce37b2cSAndreas Gruenbacher * The GL_SKIP flag indicates to skip reading the inode 1633ce37b2cSAndreas Gruenbacher * block. We read the inode with gfs2_inode_refresh 1643ce37b2cSAndreas Gruenbacher * after possibly checking the block type. 1653ce37b2cSAndreas Gruenbacher */ 1663ce37b2cSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 1673ce37b2cSAndreas Gruenbacher GL_SKIP, &i_gh); 1683ce37b2cSAndreas Gruenbacher if (error) 16940e7e86eSAndreas Gruenbacher goto fail; 1703ce37b2cSAndreas Gruenbacher 171b66648adSAndreas Gruenbacher error = -ESTALE; 172b66648adSAndreas Gruenbacher if (no_formal_ino && 173b66648adSAndreas Gruenbacher gfs2_inode_already_deleted(ip->i_gl, no_formal_ino)) 174b66648adSAndreas Gruenbacher goto fail; 175b66648adSAndreas Gruenbacher 1763ce37b2cSAndreas Gruenbacher if (blktype != GFS2_BLKST_FREE) { 1773ce37b2cSAndreas Gruenbacher error = gfs2_check_blk_type(sdp, no_addr, 1783ce37b2cSAndreas Gruenbacher blktype); 1793ce37b2cSAndreas Gruenbacher if (error) 18040e7e86eSAndreas Gruenbacher goto fail; 1813ce37b2cSAndreas Gruenbacher } 1823ce37b2cSAndreas Gruenbacher } 1833ce37b2cSAndreas Gruenbacher 1844d7c18c7SBob Peterson glock_set_object(ip->i_gl, ip); 185f2e70d8fSBob Peterson set_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags); 1862ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 1872ab9cd1cSSteven Whitehouse if (unlikely(error)) 18840e7e86eSAndreas Gruenbacher goto fail; 1894fd1a579SAndreas Gruenbacher glock_set_object(ip->i_iopen_gh.gh_gl, ip); 1902ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1912ab9cd1cSSteven Whitehouse io_gl = NULL; 1922ab9cd1cSSteven Whitehouse 1932b0fb353SAndreas Gruenbacher /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 1942b0fb353SAndreas Gruenbacher inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 1952b0fb353SAndreas Gruenbacher inode->i_atime.tv_nsec = 0; 1962b0fb353SAndreas Gruenbacher 1972ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1982ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 199f2e70d8fSBob Peterson error = gfs2_instantiate(&i_gh); 2002ab9cd1cSSteven Whitehouse if (error) 20140e7e86eSAndreas Gruenbacher goto fail; 2022ab9cd1cSSteven Whitehouse } else { 2032b0fb353SAndreas Gruenbacher ip->i_no_formal_ino = no_formal_ino; 2042ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 2052ab9cd1cSSteven Whitehouse } 2062ab9cd1cSSteven Whitehouse 2076df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2083ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 209b66648adSAndreas Gruenbacher 210b66648adSAndreas Gruenbacher gfs2_set_iop(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) { 2155902f4ddSAndreas Gruenbacher error = -ESTALE; 216b66648adSAndreas Gruenbacher if (inode->i_state & I_NEW) 217b66648adSAndreas Gruenbacher goto fail; 218b66648adSAndreas Gruenbacher iput(inode); 2195902f4ddSAndreas Gruenbacher return ERR_PTR(error); 220b66648adSAndreas Gruenbacher } 221b66648adSAndreas Gruenbacher 222b66648adSAndreas Gruenbacher if (inode->i_state & I_NEW) 223b66648adSAndreas Gruenbacher unlock_new_inode(inode); 224b66648adSAndreas Gruenbacher 2252ab9cd1cSSteven Whitehouse return inode; 2262ab9cd1cSSteven Whitehouse 22740e7e86eSAndreas Gruenbacher fail: 228763766c0SBob Peterson if (gfs2_holder_initialized(&ip->i_iopen_gh)) { 229763766c0SBob Peterson glock_clear_object(ip->i_iopen_gh.gh_gl, ip); 230763766c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 231763766c0SBob Peterson } 2322ab9cd1cSSteven Whitehouse if (io_gl) 2332ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 2346df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2353ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 2362ab9cd1cSSteven Whitehouse iget_failed(inode); 2372ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2382ab9cd1cSSteven Whitehouse } 2392ab9cd1cSSteven Whitehouse 2406bdcadeaSAndreas Gruenbacher /** 2416bdcadeaSAndreas Gruenbacher * gfs2_lookup_by_inum - look up an inode by inode number 2426bdcadeaSAndreas Gruenbacher * @sdp: The super block 2436bdcadeaSAndreas Gruenbacher * @no_addr: The inode number 2446bdcadeaSAndreas Gruenbacher * @no_formal_ino: The inode generation number (0 for any) 2456bdcadeaSAndreas Gruenbacher * @blktype: Requested block type (see gfs2_inode_lookup) 2466bdcadeaSAndreas Gruenbacher */ 2472ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2486bdcadeaSAndreas Gruenbacher u64 no_formal_ino, unsigned int blktype) 2492ab9cd1cSSteven Whitehouse { 2502ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2513ce37b2cSAndreas Gruenbacher struct inode *inode; 2522ab9cd1cSSteven Whitehouse int error; 2532ab9cd1cSSteven Whitehouse 254b66648adSAndreas Gruenbacher inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, 255b66648adSAndreas Gruenbacher blktype); 2562ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2573ce37b2cSAndreas Gruenbacher return inode; 2582ab9cd1cSSteven Whitehouse 2592ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2602ab9cd1cSSteven Whitehouse error = -EIO; 2612ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2622ab9cd1cSSteven Whitehouse goto fail_iput; 2632ab9cd1cSSteven Whitehouse } 2643ce37b2cSAndreas Gruenbacher return inode; 2652ab9cd1cSSteven Whitehouse 2662ab9cd1cSSteven Whitehouse fail_iput: 2672ab9cd1cSSteven Whitehouse iput(inode); 2683ce37b2cSAndreas Gruenbacher return ERR_PTR(error); 2692ab9cd1cSSteven Whitehouse } 2702ab9cd1cSSteven Whitehouse 2712ab9cd1cSSteven Whitehouse 2722ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2732ab9cd1cSSteven Whitehouse { 2742ab9cd1cSSteven Whitehouse struct qstr qstr; 2752ab9cd1cSSteven Whitehouse struct inode *inode; 2762ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2772ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2782ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2792ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2802ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2812ab9cd1cSSteven Whitehouse * and do not check for NULL. 2822ab9cd1cSSteven Whitehouse */ 2832ab9cd1cSSteven Whitehouse if (inode == NULL) 2842ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2852ab9cd1cSSteven Whitehouse else 2862ab9cd1cSSteven Whitehouse return inode; 2872ab9cd1cSSteven Whitehouse } 2882ab9cd1cSSteven Whitehouse 2892ab9cd1cSSteven Whitehouse 2902ab9cd1cSSteven Whitehouse /** 2912ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 292c551f66cSLee Jones * @dir: The inode of the directory containing the inode to look-up 2932ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2942ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2952ab9cd1cSSteven Whitehouse * 2962ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2972ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2982ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2992ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 3002ab9cd1cSSteven Whitehouse * 3012ab9cd1cSSteven Whitehouse * Returns: errno 3022ab9cd1cSSteven Whitehouse */ 3032ab9cd1cSSteven Whitehouse 3042ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 3052ab9cd1cSSteven Whitehouse int is_root) 3062ab9cd1cSSteven Whitehouse { 3072ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 3082ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 3092ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 3102ab9cd1cSSteven Whitehouse int error = 0; 3112ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 3122ab9cd1cSSteven Whitehouse 3136df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&d_gh); 3142ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 3152ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 3162ab9cd1cSSteven Whitehouse 3172ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 3182ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 3192b0143b5SDavid Howells dir == d_inode(sb->s_root))) { 3202ab9cd1cSSteven Whitehouse igrab(dir); 3212ab9cd1cSSteven Whitehouse return dir; 3222ab9cd1cSSteven Whitehouse } 3232ab9cd1cSSteven Whitehouse 3242ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3252ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3262ab9cd1cSSteven Whitehouse if (error) 3272ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3282ab9cd1cSSteven Whitehouse } 3292ab9cd1cSSteven Whitehouse 3302ab9cd1cSSteven Whitehouse if (!is_root) { 331549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, dir, MAY_EXEC); 3322ab9cd1cSSteven Whitehouse if (error) 3332ab9cd1cSSteven Whitehouse goto out; 3342ab9cd1cSSteven Whitehouse } 3352ab9cd1cSSteven Whitehouse 3365a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3372ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3382ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3392ab9cd1cSSteven Whitehouse out: 3406df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&d_gh)) 3412ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3422ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3432ab9cd1cSSteven Whitehouse return NULL; 3442ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3452ab9cd1cSSteven Whitehouse } 3462ab9cd1cSSteven Whitehouse 3472ab9cd1cSSteven Whitehouse /** 3482ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3492ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3502ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3512ab9cd1cSSteven Whitehouse * @mode: 3522ab9cd1cSSteven Whitehouse * 3532ab9cd1cSSteven Whitehouse * Returns: errno 3542ab9cd1cSSteven Whitehouse */ 3552ab9cd1cSSteven Whitehouse 3562ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 357175a4eb7SAl Viro umode_t mode) 3582ab9cd1cSSteven Whitehouse { 3592ab9cd1cSSteven Whitehouse int error; 3602ab9cd1cSSteven Whitehouse 361549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, &dip->i_inode, 362549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 3632ab9cd1cSSteven Whitehouse if (error) 3642ab9cd1cSSteven Whitehouse return error; 3652ab9cd1cSSteven Whitehouse 3662ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3672ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3682ab9cd1cSSteven Whitehouse return -ENOENT; 3692ab9cd1cSSteven Whitehouse 3702ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3712ab9cd1cSSteven Whitehouse return -EFBIG; 3722ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3732ab9cd1cSSteven Whitehouse return -EMLINK; 3742ab9cd1cSSteven Whitehouse 3752ab9cd1cSSteven Whitehouse return 0; 3762ab9cd1cSSteven Whitehouse } 3772ab9cd1cSSteven Whitehouse 378c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 379c9aecf73SSteven Whitehouse struct inode *inode) 3802ab9cd1cSSteven Whitehouse { 3812ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3826b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3836b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 384c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 385c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3866b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 387c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 388c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3892ab9cd1cSSteven Whitehouse } else 390c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3912ab9cd1cSSteven Whitehouse 3922ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 393c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 394c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 395c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3962ab9cd1cSSteven Whitehouse } else 397c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3982ab9cd1cSSteven Whitehouse } 3992ab9cd1cSSteven Whitehouse 400b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 4012ab9cd1cSSteven Whitehouse { 402c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 403b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 4042ab9cd1cSSteven Whitehouse int error; 4052ab9cd1cSSteven Whitehouse 406b8fbf471SAbhi Das error = gfs2_quota_lock_check(ip, &ap); 4072ab9cd1cSSteven Whitehouse if (error) 4082ab9cd1cSSteven Whitehouse goto out; 4092ab9cd1cSSteven Whitehouse 4107b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 411fd4b4e04SSteven Whitehouse if (error) 412fd4b4e04SSteven Whitehouse goto out_quota; 413fd4b4e04SSteven Whitehouse 414b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 4152ab9cd1cSSteven Whitehouse if (error) 4162ab9cd1cSSteven Whitehouse goto out_ipreserv; 4172ab9cd1cSSteven Whitehouse 418b2c8b3eaSSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 419c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 420c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 421c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 4222ab9cd1cSSteven Whitehouse 4232ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4242ab9cd1cSSteven Whitehouse 4252ab9cd1cSSteven Whitehouse out_ipreserv: 426c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 427fd4b4e04SSteven Whitehouse out_quota: 428fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4292ab9cd1cSSteven Whitehouse out: 4302ab9cd1cSSteven Whitehouse return error; 4312ab9cd1cSSteven Whitehouse } 4322ab9cd1cSSteven Whitehouse 433f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 434f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 435e2d0a13bSSteven Whitehouse { 436e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 437e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 438e2d0a13bSSteven Whitehouse 439e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 440e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 441e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 442e2d0a13bSSteven Whitehouse 443e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 444e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 445e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 446e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 447e2d0a13bSSteven Whitehouse 448e2d0a13bSSteven Whitehouse } 449e2d0a13bSSteven Whitehouse 4502ab9cd1cSSteven Whitehouse /** 451b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 452b2c8b3eaSSteven Whitehouse * @ip: The inode in question 453b2c8b3eaSSteven Whitehouse * 454b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 455b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 456b2c8b3eaSSteven Whitehouse */ 457b2c8b3eaSSteven Whitehouse 458b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 459b2c8b3eaSSteven Whitehouse { 460b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 461b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 462b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 463b2c8b3eaSSteven Whitehouse 464b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 465b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 466b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 467b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 468b2c8b3eaSSteven Whitehouse 469b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 470b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 471b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 472b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 473b2c8b3eaSSteven Whitehouse 474b2c8b3eaSSteven Whitehouse brelse(bh); 475b2c8b3eaSSteven Whitehouse } 476b2c8b3eaSSteven Whitehouse 477b2c8b3eaSSteven Whitehouse /** 4782ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 479f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 480c9aecf73SSteven Whitehouse * @ip: The inode 481f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 4822ab9cd1cSSteven Whitehouse * 4832ab9cd1cSSteven Whitehouse */ 4842ab9cd1cSSteven Whitehouse 485c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 48679ba7480SSteven Whitehouse const char *symname) 4872ab9cd1cSSteven Whitehouse { 4882ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4892ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4902ab9cd1cSSteven Whitehouse 491c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 492350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4932ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 49479ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4952ab9cd1cSSteven Whitehouse 4966f24784fSAl Viro di->di_major = cpu_to_be32(imajor(&ip->i_inode)); 4976f24784fSAl Viro di->di_minor = cpu_to_be32(iminor(&ip->i_inode)); 4982ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4992ab9cd1cSSteven Whitehouse di->__pad2 = 0; 5002ab9cd1cSSteven Whitehouse di->__pad3 = 0; 5012ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 5022ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 50379ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 5042ab9cd1cSSteven Whitehouse 505c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 506160b4026SSteven Whitehouse case S_IFDIR: 507e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 508160b4026SSteven Whitehouse break; 509160b4026SSteven Whitehouse case S_IFLNK: 510c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 511160b4026SSteven Whitehouse break; 512e2d0a13bSSteven Whitehouse } 513e2d0a13bSSteven Whitehouse 5142ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 51579ba7480SSteven Whitehouse brelse(dibh); 5162ab9cd1cSSteven Whitehouse } 5172ab9cd1cSSteven Whitehouse 518534cf9caSSteven Whitehouse /** 519c551f66cSLee Jones * gfs2_trans_da_blks - Calculate number of blocks to link inode 520534cf9caSSteven Whitehouse * @dip: The directory we are linking into 521534cf9caSSteven Whitehouse * @da: The dir add information 522534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 523534cf9caSSteven Whitehouse * 524534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 525534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 526534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 527534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 528534cf9caSSteven Whitehouse * 529534cf9caSSteven Whitehouse * Returns: Number of blocks 530534cf9caSSteven Whitehouse */ 531534cf9caSSteven Whitehouse 532534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 533534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 534534cf9caSSteven Whitehouse unsigned nr_inodes) 535534cf9caSSteven Whitehouse { 536534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 537534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 538534cf9caSSteven Whitehouse } 539534cf9caSSteven Whitehouse 5402ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5413c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5422ab9cd1cSSteven Whitehouse { 5432ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5443c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5452ab9cd1cSSteven Whitehouse int error; 5462ab9cd1cSSteven Whitehouse 5473c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 548b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 5492ab9cd1cSSteven Whitehouse if (error) 5502ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5512ab9cd1cSSteven Whitehouse 5527b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5532ab9cd1cSSteven Whitehouse if (error) 5542ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5552ab9cd1cSSteven Whitehouse 556534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5572ab9cd1cSSteven Whitehouse if (error) 5582ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5592ab9cd1cSSteven Whitehouse } else { 5602ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5612ab9cd1cSSteven Whitehouse if (error) 5622ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5632ab9cd1cSSteven Whitehouse } 5642ab9cd1cSSteven Whitehouse 5652b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5662ab9cd1cSSteven Whitehouse 5672ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5682ab9cd1cSSteven Whitehouse fail_ipreserv: 5692ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5702ab9cd1cSSteven Whitehouse fail_quota_locks: 5712ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5722ab9cd1cSSteven Whitehouse return error; 5732ab9cd1cSSteven Whitehouse } 5742ab9cd1cSSteven Whitehouse 57546cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5769d8f13baSMimi Zohar void *fs_info) 5772ab9cd1cSSteven Whitehouse { 5789d8f13baSMimi Zohar const struct xattr *xattr; 5799d8f13baSMimi Zohar int err = 0; 5802ab9cd1cSSteven Whitehouse 5819d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5829d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5839d8f13baSMimi Zohar xattr->value_len, 0, 5849d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5859d8f13baSMimi Zohar if (err < 0) 5869d8f13baSMimi Zohar break; 5879d8f13baSMimi Zohar } 5882ab9cd1cSSteven Whitehouse return err; 5892ab9cd1cSSteven Whitehouse } 5902ab9cd1cSSteven Whitehouse 5912ab9cd1cSSteven Whitehouse /** 592f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 593f2741d98SSteven Whitehouse * @dir: The parent directory 594f2741d98SSteven Whitehouse * @dentry: The new dentry 5956d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 596f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 597f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 598f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 599f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 600c551f66cSLee Jones * @excl: Force fail if inode exists 6012ab9cd1cSSteven Whitehouse * 602f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 6032ab9cd1cSSteven Whitehouse */ 6042ab9cd1cSSteven Whitehouse 605f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 6066d4ade98SSteven Whitehouse struct file *file, 607175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 608b452a458SAl Viro unsigned int size, int excl) 6092ab9cd1cSSteven Whitehouse { 610f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 611e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 612f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 6132ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 6148e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 6152ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 616a55a47a3SAndreas Gruenbacher struct gfs2_glock *io_gl; 617783013c0SBob Peterson int error, free_vfs_inode = 1; 6189dbe9610SSteven Whitehouse u32 aflags = 0; 619b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 62019aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 6212ab9cd1cSSteven Whitehouse 6222ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 623f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6242ab9cd1cSSteven Whitehouse 6252fba46a0SBob Peterson error = gfs2_qa_get(dip); 6260a305e49SBob Peterson if (error) 6270a305e49SBob Peterson return error; 6280a305e49SBob Peterson 629fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 630fd4b4e04SSteven Whitehouse if (error) 6312fba46a0SBob Peterson goto fail; 632fd4b4e04SSteven Whitehouse 633f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 6342ab9cd1cSSteven Whitehouse if (error) 6352ab9cd1cSSteven Whitehouse goto fail; 636e0b62e21SAndreas Gruenbacher gfs2_holder_mark_uninitialized(ghs + 1); 6372ab9cd1cSSteven Whitehouse 6382ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6392ab9cd1cSSteven Whitehouse if (error) 6402ab9cd1cSSteven Whitehouse goto fail_gunlock; 6412ab9cd1cSSteven Whitehouse 6425a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6435a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6445a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 645571a4b57SAl Viro if (S_ISDIR(inode->i_mode)) { 646571a4b57SAl Viro iput(inode); 647571a4b57SAl Viro inode = ERR_PTR(-EISDIR); 648571a4b57SAl Viro goto fail_gunlock; 649571a4b57SAl Viro } 65044bb31baSAl Viro d_instantiate(dentry, inode); 6516d4ade98SSteven Whitehouse error = 0; 6520d0d1107SMiklos Szeredi if (file) { 65344bb31baSAl Viro if (S_ISREG(inode->i_mode)) 654be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 65544bb31baSAl Viro else 65644bb31baSAl Viro error = finish_no_open(file, NULL); 6575ca1db41SMiklos Szeredi } 6585a00f3ccSSteven Whitehouse gfs2_glock_dq_uninit(ghs); 6592297ab61SBob Peterson goto fail; 6605a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6615a00f3ccSSteven Whitehouse goto fail_gunlock; 6625a00f3ccSSteven Whitehouse } 6635a00f3ccSSteven Whitehouse 6643c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 665fd4b4e04SSteven Whitehouse if (error < 0) 666fd4b4e04SSteven Whitehouse goto fail_gunlock; 667fd4b4e04SSteven Whitehouse 668c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 669fd4b4e04SSteven Whitehouse error = -ENOMEM; 670fd4b4e04SSteven Whitehouse if (!inode) 671fd4b4e04SSteven Whitehouse goto fail_gunlock; 672fd4b4e04SSteven Whitehouse 673e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 674e01580bfSChristoph Hellwig if (error) 675783013c0SBob Peterson goto fail_gunlock; 676e01580bfSChristoph Hellwig 6778e2e0047SBob Peterson ip = GFS2_I(inode); 6782fba46a0SBob Peterson error = gfs2_qa_get(ip); 679ff7f4cb4SSteven Whitehouse if (error) 680e01580bfSChristoph Hellwig goto fail_free_acls; 681c9aecf73SSteven Whitehouse 682c9aecf73SSteven Whitehouse inode->i_mode = mode; 68379ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 684c9aecf73SSteven Whitehouse inode->i_rdev = dev; 685c9aecf73SSteven Whitehouse inode->i_size = size; 686078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 687c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 68800a158beSAbhi Das check_and_update_goal(dip); 689c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 69028fb3027SSteven Whitehouse ip->i_diskflags = 0; 69128fb3027SSteven Whitehouse ip->i_eattr = 0; 69228fb3027SSteven Whitehouse ip->i_height = 0; 69328fb3027SSteven Whitehouse ip->i_depth = 0; 69428fb3027SSteven Whitehouse ip->i_entries = 0; 695cc963a11SBob Peterson ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 69628fb3027SSteven Whitehouse 69728fb3027SSteven Whitehouse switch(mode & S_IFMT) { 69828fb3027SSteven Whitehouse case S_IFREG: 69928fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 70028fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 70128fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 70228fb3027SSteven Whitehouse gfs2_set_aops(inode); 70328fb3027SSteven Whitehouse break; 70428fb3027SSteven Whitehouse case S_IFDIR: 70528fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 70628fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 70728fb3027SSteven Whitehouse ip->i_entries = 2; 70828fb3027SSteven Whitehouse break; 70928fb3027SSteven Whitehouse } 710acc546fdSAbhi Das 711acc546fdSAbhi Das /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 712acc546fdSAbhi Das if (dip->i_diskflags & GFS2_DIF_SYSTEM) 713acc546fdSAbhi Das ip->i_diskflags |= GFS2_DIF_SYSTEM; 714acc546fdSAbhi Das 71528fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 716c9aecf73SSteven Whitehouse 7172b0143b5SDavid Howells if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 7189dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7199dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7209dbe9610SSteven Whitehouse 721b2c8b3eaSSteven Whitehouse if (default_acl || acl) 722b2c8b3eaSSteven Whitehouse blocks++; 723b2c8b3eaSSteven Whitehouse 724b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 725c9aecf73SSteven Whitehouse if (error) 726c9aecf73SSteven Whitehouse goto fail_free_inode; 727c9aecf73SSteven Whitehouse 728b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 729b2c8b3eaSSteven Whitehouse 730c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 731c9aecf73SSteven Whitehouse if (error) 732c9aecf73SSteven Whitehouse goto fail_free_inode; 73398e5a91aSAndreas Gruenbacher flush_delayed_work(&ip->i_gl->gl_work); 73498e5a91aSAndreas Gruenbacher 735dd0ecf54SAndreas Gruenbacher error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 736c9aecf73SSteven Whitehouse if (error) 737c9aecf73SSteven Whitehouse goto fail_free_inode; 738dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 739dd0ecf54SAndreas Gruenbacher 740dd0ecf54SAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 741dd0ecf54SAndreas Gruenbacher if (error) 742dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 743c9aecf73SSteven Whitehouse 744*8793e149SBob Peterson glock_set_object(ip->i_gl, ip); 745b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 746c9aecf73SSteven Whitehouse if (error) 747dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 7480a305e49SBob Peterson 749b2c8b3eaSSteven Whitehouse if (blocks > 1) { 750b2c8b3eaSSteven Whitehouse ip->i_eattr = ip->i_no_addr + 1; 751b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 752b2c8b3eaSSteven Whitehouse } 75379ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 754fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 755fd4b4e04SSteven Whitehouse 756c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 757c9aecf73SSteven Whitehouse if (error) 758c9aecf73SSteven Whitehouse goto fail_gunlock2; 759c9aecf73SSteven Whitehouse 760*8793e149SBob Peterson glock_set_object(io_gl, ip); 761c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 762c9aecf73SSteven Whitehouse insert_inode_hash(inode); 763c9aecf73SSteven Whitehouse 764783013c0SBob Peterson free_vfs_inode = 0; /* After this point, the inode is no longer 765783013c0SBob Peterson considered free. Any failures need to undo 766783013c0SBob Peterson the gfs2 structures. */ 767e01580bfSChristoph Hellwig if (default_acl) { 7681a39ba99SAl Viro error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 7692ab9cd1cSSteven Whitehouse if (error) 770c9aecf73SSteven Whitehouse goto fail_gunlock3; 7716ff9b09eSAndreas Gruenbacher posix_acl_release(default_acl); 7726ff9b09eSAndreas Gruenbacher default_acl = NULL; 7736ff9b09eSAndreas Gruenbacher } 7746ff9b09eSAndreas Gruenbacher if (acl) { 7756ff9b09eSAndreas Gruenbacher error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 7766ff9b09eSAndreas Gruenbacher if (error) 7776ff9b09eSAndreas Gruenbacher goto fail_gunlock3; 7786ff9b09eSAndreas Gruenbacher posix_acl_release(acl); 7796ff9b09eSAndreas Gruenbacher acl = NULL; 7806ff9b09eSAndreas Gruenbacher } 7812ab9cd1cSSteven Whitehouse 782f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 783f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7842ab9cd1cSSteven Whitehouse if (error) 785c9aecf73SSteven Whitehouse goto fail_gunlock3; 7862ab9cd1cSSteven Whitehouse 7873c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 7882ab9cd1cSSteven Whitehouse if (error) 789c9aecf73SSteven Whitehouse goto fail_gunlock3; 7902ab9cd1cSSteven Whitehouse 79179ba7480SSteven Whitehouse mark_inode_dirty(inode); 7926d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 7932c47c1beSBob Peterson /* After instantiate, errors should result in evict which will destroy 7942c47c1beSBob Peterson * both inode and iopen glocks properly. */ 795c5bf8fefSMiklos Szeredi if (file) { 79673a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 797be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 798c5bf8fefSMiklos Szeredi } 79928fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 8002297ab61SBob Peterson gfs2_qa_put(ip); 80128fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 8022c47c1beSBob Peterson gfs2_glock_put(io_gl); 8032297ab61SBob Peterson gfs2_qa_put(dip); 8046d4ade98SSteven Whitehouse return error; 8052ab9cd1cSSteven Whitehouse 806c9aecf73SSteven Whitehouse fail_gunlock3: 8079c1b2808SBob Peterson glock_clear_object(io_gl, ip); 808783013c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 8092ab9cd1cSSteven Whitehouse fail_gunlock2: 810dd0ecf54SAndreas Gruenbacher glock_clear_object(io_gl, ip); 8112c47c1beSBob Peterson gfs2_glock_put(io_gl); 812c9aecf73SSteven Whitehouse fail_free_inode: 8139c1b2808SBob Peterson if (ip->i_gl) { 8149c1b2808SBob Peterson glock_clear_object(ip->i_gl, ip); 8151a0b00d1SBob Peterson if (free_vfs_inode) /* else evict will do the put for us */ 816c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 8179c1b2808SBob Peterson } 8181595548fSAndreas Gruenbacher gfs2_rs_delete(ip, NULL); 8191595548fSAndreas Gruenbacher gfs2_qa_put(ip); 820e01580bfSChristoph Hellwig fail_free_acls: 821e01580bfSChristoph Hellwig posix_acl_release(default_acl); 822e01580bfSChristoph Hellwig posix_acl_release(acl); 8232ab9cd1cSSteven Whitehouse fail_gunlock: 8242b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 825f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 82615a798f7SKefeng Wang if (!IS_ERR_OR_NULL(inode)) { 82779ba7480SSteven Whitehouse clear_nlink(inode); 82805978803SAbhi Das if (!free_vfs_inode) 82979ba7480SSteven Whitehouse mark_inode_dirty(inode); 83005978803SAbhi Das set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 83105978803SAbhi Das &GFS2_I(inode)->i_flags); 83240ac218fSSteven Whitehouse iput(inode); 83340ac218fSSteven Whitehouse } 834e0b62e21SAndreas Gruenbacher if (gfs2_holder_initialized(ghs + 1)) 835e0b62e21SAndreas Gruenbacher gfs2_glock_dq_uninit(ghs + 1); 8362ab9cd1cSSteven Whitehouse fail: 8372fba46a0SBob Peterson gfs2_qa_put(dip); 838f2741d98SSteven Whitehouse return error; 8392ab9cd1cSSteven Whitehouse } 840f2741d98SSteven Whitehouse 8412ab9cd1cSSteven Whitehouse /** 8422ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 843c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 8442ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8452ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8462ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 847c551f66cSLee Jones * @excl: Force fail if inode exists 8482ab9cd1cSSteven Whitehouse * 8492ab9cd1cSSteven Whitehouse * Returns: errno 8502ab9cd1cSSteven Whitehouse */ 8512ab9cd1cSSteven Whitehouse 852549c7297SChristian Brauner static int gfs2_create(struct user_namespace *mnt_userns, struct inode *dir, 853549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 8542ab9cd1cSSteven Whitehouse { 855b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 8562ab9cd1cSSteven Whitehouse } 8572ab9cd1cSSteven Whitehouse 8582ab9cd1cSSteven Whitehouse /** 8596d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8602ab9cd1cSSteven Whitehouse * @dir: The directory inode 8612ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8626d4ade98SSteven Whitehouse * @file: File to be opened 8632ab9cd1cSSteven Whitehouse * 8642ab9cd1cSSteven Whitehouse * 8652ab9cd1cSSteven Whitehouse * Returns: errno 8662ab9cd1cSSteven Whitehouse */ 8672ab9cd1cSSteven Whitehouse 8686d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 869b452a458SAl Viro struct file *file) 8702ab9cd1cSSteven Whitehouse { 8716d4ade98SSteven Whitehouse struct inode *inode; 8726d4ade98SSteven Whitehouse struct dentry *d; 8732ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8746d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8752ab9cd1cSSteven Whitehouse int error; 8766d4ade98SSteven Whitehouse 8776d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8787b7a9115SBenjamin Coddington if (inode == NULL) { 8797b7a9115SBenjamin Coddington d_add(dentry, NULL); 8806d4ade98SSteven Whitehouse return NULL; 8817b7a9115SBenjamin Coddington } 8826d4ade98SSteven Whitehouse if (IS_ERR(inode)) 8836d4ade98SSteven Whitehouse return ERR_CAST(inode); 8846d4ade98SSteven Whitehouse 8856d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 8862ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8872ab9cd1cSSteven Whitehouse if (error) { 8882ab9cd1cSSteven Whitehouse iput(inode); 8892ab9cd1cSSteven Whitehouse return ERR_PTR(error); 8902ab9cd1cSSteven Whitehouse } 8916d4ade98SSteven Whitehouse 8926d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 893d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 894d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 895d57b9c9aSJ. Bruce Fields return d; 896d57b9c9aSJ. Bruce Fields } 8976d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 898be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 8996d4ade98SSteven Whitehouse 9002ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 9015ca1db41SMiklos Szeredi if (error) { 9025ca1db41SMiklos Szeredi dput(d); 9036d4ade98SSteven Whitehouse return ERR_PTR(error); 9045ca1db41SMiklos Szeredi } 9056d4ade98SSteven Whitehouse return d; 9062ab9cd1cSSteven Whitehouse } 9076d4ade98SSteven Whitehouse 9086d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 9096d4ade98SSteven Whitehouse unsigned flags) 9106d4ade98SSteven Whitehouse { 911b452a458SAl Viro return __gfs2_lookup(dir, dentry, NULL); 9122ab9cd1cSSteven Whitehouse } 9132ab9cd1cSSteven Whitehouse 9142ab9cd1cSSteven Whitehouse /** 9152ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 9162ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 9172ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 9182ab9cd1cSSteven Whitehouse * @dentry: The name of the link 9192ab9cd1cSSteven Whitehouse * 9202ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 9212ab9cd1cSSteven Whitehouse * name in "dentry". 9222ab9cd1cSSteven Whitehouse * 9232ab9cd1cSSteven Whitehouse * Returns: errno 9242ab9cd1cSSteven Whitehouse */ 9252ab9cd1cSSteven Whitehouse 9262ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 9272ab9cd1cSSteven Whitehouse struct dentry *dentry) 9282ab9cd1cSSteven Whitehouse { 9292ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9302ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9312b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 9322ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9332ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 9342ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 93519aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 9362ab9cd1cSSteven Whitehouse int error; 9372ab9cd1cSSteven Whitehouse 9382ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9392ab9cd1cSSteven Whitehouse return -EPERM; 9402ab9cd1cSSteven Whitehouse 9412fba46a0SBob Peterson error = gfs2_qa_get(dip); 9420a305e49SBob Peterson if (error) 9430a305e49SBob Peterson return error; 9440a305e49SBob Peterson 9452ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 9462ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 9472ab9cd1cSSteven Whitehouse 9482ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 9492ab9cd1cSSteven Whitehouse if (error) 9502ab9cd1cSSteven Whitehouse goto out_parent; 9512ab9cd1cSSteven Whitehouse 9522ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 9532ab9cd1cSSteven Whitehouse if (error) 9542ab9cd1cSSteven Whitehouse goto out_child; 9552ab9cd1cSSteven Whitehouse 9562ab9cd1cSSteven Whitehouse error = -ENOENT; 9572ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9582ab9cd1cSSteven Whitehouse goto out_gunlock; 9592ab9cd1cSSteven Whitehouse 960549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, dir, MAY_WRITE | MAY_EXEC); 9612ab9cd1cSSteven Whitehouse if (error) 9622ab9cd1cSSteven Whitehouse goto out_gunlock; 9632ab9cd1cSSteven Whitehouse 9642ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9652ab9cd1cSSteven Whitehouse switch (error) { 9662ab9cd1cSSteven Whitehouse case -ENOENT: 9672ab9cd1cSSteven Whitehouse break; 9682ab9cd1cSSteven Whitehouse case 0: 9692ab9cd1cSSteven Whitehouse error = -EEXIST; 970e5966cf2SGustavo A. R. Silva goto out_gunlock; 9712ab9cd1cSSteven Whitehouse default: 9722ab9cd1cSSteven Whitehouse goto out_gunlock; 9732ab9cd1cSSteven Whitehouse } 9742ab9cd1cSSteven Whitehouse 9752ab9cd1cSSteven Whitehouse error = -EINVAL; 9762ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9772ab9cd1cSSteven Whitehouse goto out_gunlock; 9782ab9cd1cSSteven Whitehouse error = -EFBIG; 9792ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9802ab9cd1cSSteven Whitehouse goto out_gunlock; 9812ab9cd1cSSteven Whitehouse error = -EPERM; 9822ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 9832ab9cd1cSSteven Whitehouse goto out_gunlock; 9842ab9cd1cSSteven Whitehouse error = -EINVAL; 9852ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 9862ab9cd1cSSteven Whitehouse goto out_gunlock; 9872ab9cd1cSSteven Whitehouse error = -EMLINK; 9882ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 9892ab9cd1cSSteven Whitehouse goto out_gunlock; 9902ab9cd1cSSteven Whitehouse 9913c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 9922ab9cd1cSSteven Whitehouse if (error < 0) 9932ab9cd1cSSteven Whitehouse goto out_gunlock; 9942ab9cd1cSSteven Whitehouse 9953c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 9963c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 997b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 9982ab9cd1cSSteven Whitehouse if (error) 9995407e242SBob Peterson goto out_gunlock; 10002ab9cd1cSSteven Whitehouse 10017b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 10022ab9cd1cSSteven Whitehouse if (error) 10032ab9cd1cSSteven Whitehouse goto out_gunlock_q; 10042ab9cd1cSSteven Whitehouse 1005534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 10062ab9cd1cSSteven Whitehouse if (error) 10072ab9cd1cSSteven Whitehouse goto out_ipres; 10082ab9cd1cSSteven Whitehouse } else { 10092ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 10102ab9cd1cSSteven Whitehouse if (error) 10112ab9cd1cSSteven Whitehouse goto out_ipres; 10122ab9cd1cSSteven Whitehouse } 10132ab9cd1cSSteven Whitehouse 10142ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 10152ab9cd1cSSteven Whitehouse if (error) 10162ab9cd1cSSteven Whitehouse goto out_end_trans; 10172ab9cd1cSSteven Whitehouse 10182b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 10192ab9cd1cSSteven Whitehouse if (error) 10202ab9cd1cSSteven Whitehouse goto out_brelse; 10212ab9cd1cSSteven Whitehouse 1022350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 10232ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 1024078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 1025ab9bbda0SSteven Whitehouse ihold(inode); 1026ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 1027ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 10282ab9cd1cSSteven Whitehouse 10292ab9cd1cSSteven Whitehouse out_brelse: 10302ab9cd1cSSteven Whitehouse brelse(dibh); 10312ab9cd1cSSteven Whitehouse out_end_trans: 10322ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10332ab9cd1cSSteven Whitehouse out_ipres: 10343c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10352ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10362ab9cd1cSSteven Whitehouse out_gunlock_q: 10373c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10382ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10392ab9cd1cSSteven Whitehouse out_gunlock: 10402b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 10412ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10422ab9cd1cSSteven Whitehouse out_child: 10432ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10442ab9cd1cSSteven Whitehouse out_parent: 10452297ab61SBob Peterson gfs2_qa_put(dip); 10462ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10472ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10482ab9cd1cSSteven Whitehouse return error; 10492ab9cd1cSSteven Whitehouse } 10502ab9cd1cSSteven Whitehouse 10512ab9cd1cSSteven Whitehouse /* 10522ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10532ab9cd1cSSteven Whitehouse * @dip: the directory 10542ab9cd1cSSteven Whitehouse * @name: the name of the file 10552ab9cd1cSSteven Whitehouse * @ip: the inode 10562ab9cd1cSSteven Whitehouse * 10572ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10582ab9cd1cSSteven Whitehouse * 10592ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10602ab9cd1cSSteven Whitehouse */ 10612ab9cd1cSSteven Whitehouse 10622ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10632ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10642ab9cd1cSSteven Whitehouse { 10652ab9cd1cSSteven Whitehouse int error; 10662ab9cd1cSSteven Whitehouse 10672ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10682ab9cd1cSSteven Whitehouse return -EPERM; 10692ab9cd1cSSteven Whitehouse 10702ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10716b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10726b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10732ab9cd1cSSteven Whitehouse return -EPERM; 10742ab9cd1cSSteven Whitehouse 10752ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10762ab9cd1cSSteven Whitehouse return -EPERM; 10772ab9cd1cSSteven Whitehouse 1078549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, &dip->i_inode, 1079549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 10802ab9cd1cSSteven Whitehouse if (error) 10812ab9cd1cSSteven Whitehouse return error; 10822ab9cd1cSSteven Whitehouse 108337975f15SFabian Frederick return gfs2_dir_check(&dip->i_inode, name, ip); 10842ab9cd1cSSteven Whitehouse } 10852ab9cd1cSSteven Whitehouse 10862ab9cd1cSSteven Whitehouse /** 10872ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10882ab9cd1cSSteven Whitehouse * @dip: The parent directory 1089c551f66cSLee Jones * @dentry: The dentry to unlink 10902ab9cd1cSSteven Whitehouse * 10912ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 10922ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 10932ab9cd1cSSteven Whitehouse * 10942ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10952ab9cd1cSSteven Whitehouse */ 10962ab9cd1cSSteven Whitehouse 10972ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 10984327a9bfSBob Peterson const struct dentry *dentry) 10992ab9cd1cSSteven Whitehouse { 11002b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11012ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11022ab9cd1cSSteven Whitehouse int error; 11032ab9cd1cSSteven Whitehouse 11042ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 11052ab9cd1cSSteven Whitehouse if (error) 11062ab9cd1cSSteven Whitehouse return error; 11072ab9cd1cSSteven Whitehouse 11082ab9cd1cSSteven Whitehouse ip->i_entries = 0; 1109078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 11102ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 11112ab9cd1cSSteven Whitehouse clear_nlink(inode); 11122ab9cd1cSSteven Whitehouse else 11132ab9cd1cSSteven Whitehouse drop_nlink(inode); 11142ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 11152ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11162ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 11172ab9cd1cSSteven Whitehouse return 0; 11182ab9cd1cSSteven Whitehouse } 11192ab9cd1cSSteven Whitehouse 11202ab9cd1cSSteven Whitehouse 11212ab9cd1cSSteven Whitehouse /** 11222ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 11232ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 11242ab9cd1cSSteven Whitehouse * @dentry: The file itself 11252ab9cd1cSSteven Whitehouse * 11262ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 11272ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 11282ab9cd1cSSteven Whitehouse * 11292ab9cd1cSSteven Whitehouse * Returns: errno 11302ab9cd1cSSteven Whitehouse */ 11312ab9cd1cSSteven Whitehouse 11322ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11332ab9cd1cSSteven Whitehouse { 11342ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11352ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11362b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11372ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11382ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 11392ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11405e2f7d61SBob Peterson int error; 11415e2f7d61SBob Peterson 11425e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11435e2f7d61SBob Peterson if (error) 11445e2f7d61SBob Peterson return error; 11455e2f7d61SBob Peterson 11465e2f7d61SBob Peterson error = -EROFS; 11472ab9cd1cSSteven Whitehouse 11482ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 11492ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 11502ab9cd1cSSteven Whitehouse 115166fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1152a365fbf3SSteven Whitehouse if (!rgd) 115387654896SSteven Whitehouse goto out_inodes; 1154a365fbf3SSteven Whitehouse 11554fc7ec31SBob Peterson gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2); 11562ab9cd1cSSteven Whitehouse 11572ab9cd1cSSteven Whitehouse 11582ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 11592ab9cd1cSSteven Whitehouse if (error) 11602ab9cd1cSSteven Whitehouse goto out_parent; 11612ab9cd1cSSteven Whitehouse 11622ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 11632ab9cd1cSSteven Whitehouse if (error) 11642ab9cd1cSSteven Whitehouse goto out_child; 11652ab9cd1cSSteven Whitehouse 11662ab9cd1cSSteven Whitehouse error = -ENOENT; 11672ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11682ab9cd1cSSteven Whitehouse goto out_rgrp; 11692ab9cd1cSSteven Whitehouse 11702ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11712ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11722ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11732ab9cd1cSSteven Whitehouse goto out_rgrp; 11742ab9cd1cSSteven Whitehouse } 11752ab9cd1cSSteven Whitehouse 11762ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 11772ab9cd1cSSteven Whitehouse if (error) 11782ab9cd1cSSteven Whitehouse goto out_rgrp; 11792ab9cd1cSSteven Whitehouse 11802ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11812ab9cd1cSSteven Whitehouse if (error) 11822ab9cd1cSSteven Whitehouse goto out_gunlock; 11832ab9cd1cSSteven Whitehouse 11842ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 11852ab9cd1cSSteven Whitehouse if (error) 11862eb5909dSBob Peterson goto out_gunlock; 11872ab9cd1cSSteven Whitehouse 11884327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 11892ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11902eb5909dSBob Peterson 11912ab9cd1cSSteven Whitehouse out_gunlock: 11922ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11932ab9cd1cSSteven Whitehouse out_rgrp: 11942ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11952ab9cd1cSSteven Whitehouse out_child: 11962ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 11972ab9cd1cSSteven Whitehouse out_parent: 119887654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 119987654896SSteven Whitehouse out_inodes: 120087654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 12012ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 12022ab9cd1cSSteven Whitehouse return error; 12032ab9cd1cSSteven Whitehouse } 12042ab9cd1cSSteven Whitehouse 12052ab9cd1cSSteven Whitehouse /** 12062ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 1207c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12082ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 12092ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 12102ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 12112ab9cd1cSSteven Whitehouse * 12122ab9cd1cSSteven Whitehouse * Returns: errno 12132ab9cd1cSSteven Whitehouse */ 12142ab9cd1cSSteven Whitehouse 1215549c7297SChristian Brauner static int gfs2_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1216549c7297SChristian Brauner struct dentry *dentry, const char *symname) 12172ab9cd1cSSteven Whitehouse { 1218160b4026SSteven Whitehouse unsigned int size; 12192ab9cd1cSSteven Whitehouse 12202ab9cd1cSSteven Whitehouse size = strlen(symname); 1221235628c5SAndreas Gruenbacher if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 12222ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 12232ab9cd1cSSteven Whitehouse 1224b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 12252ab9cd1cSSteven Whitehouse } 12262ab9cd1cSSteven Whitehouse 12272ab9cd1cSSteven Whitehouse /** 12282ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 1229c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12302ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12312ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12322ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12332ab9cd1cSSteven Whitehouse * 12342ab9cd1cSSteven Whitehouse * Returns: errno 12352ab9cd1cSSteven Whitehouse */ 12362ab9cd1cSSteven Whitehouse 1237549c7297SChristian Brauner static int gfs2_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 1238549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 12392ab9cd1cSSteven Whitehouse { 1240235628c5SAndreas Gruenbacher unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1241b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 12422ab9cd1cSSteven Whitehouse } 12432ab9cd1cSSteven Whitehouse 12442ab9cd1cSSteven Whitehouse /** 12452ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 1246c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12472ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12482ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12492ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1250f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12512ab9cd1cSSteven Whitehouse * 12522ab9cd1cSSteven Whitehouse */ 12532ab9cd1cSSteven Whitehouse 1254549c7297SChristian Brauner static int gfs2_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1255549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t dev) 12562ab9cd1cSSteven Whitehouse { 1257b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 12586d4ade98SSteven Whitehouse } 12596d4ade98SSteven Whitehouse 12606d4ade98SSteven Whitehouse /** 12616d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12626d4ade98SSteven Whitehouse * @dir: The directory 12636d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12646d4ade98SSteven Whitehouse * @file: The proposed new struct file 12656d4ade98SSteven Whitehouse * @flags: open flags 12666d4ade98SSteven Whitehouse * @mode: File mode 12676d4ade98SSteven Whitehouse * 12686d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12696d4ade98SSteven Whitehouse */ 12706d4ade98SSteven Whitehouse 12716d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12726d4ade98SSteven Whitehouse struct file *file, unsigned flags, 127344907d79SAl Viro umode_t mode) 12746d4ade98SSteven Whitehouse { 12756d4ade98SSteven Whitehouse struct dentry *d; 12766d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12776d4ade98SSteven Whitehouse 127800699ad8SAl Viro if (!d_in_lookup(dentry)) 12794d93bc3eSAl Viro goto skip_lookup; 12804d93bc3eSAl Viro 1281b452a458SAl Viro d = __gfs2_lookup(dir, dentry, file); 12826d4ade98SSteven Whitehouse if (IS_ERR(d)) 12836d4ade98SSteven Whitehouse return PTR_ERR(d); 12845ca1db41SMiklos Szeredi if (d != NULL) 12855ca1db41SMiklos Szeredi dentry = d; 12862b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1287aad888f8SAl Viro if (!(file->f_mode & FMODE_OPENED)) 1288ec7d879cSAl Viro return finish_no_open(file, d); 12895ca1db41SMiklos Szeredi dput(d); 129021039132SAl Viro return excl && (flags & O_CREAT) ? -EEXIST : 0; 12916d4ade98SSteven Whitehouse } 12926d4ade98SSteven Whitehouse 12935ca1db41SMiklos Szeredi BUG_ON(d != NULL); 12944d93bc3eSAl Viro 12954d93bc3eSAl Viro skip_lookup: 12966d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 12976d4ade98SSteven Whitehouse return -ENOENT; 12986d4ade98SSteven Whitehouse 1299b452a458SAl Viro return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 13002ab9cd1cSSteven Whitehouse } 13012ab9cd1cSSteven Whitehouse 13022ab9cd1cSSteven Whitehouse /* 13032ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 13042ab9cd1cSSteven Whitehouse * @this: move this 13052ab9cd1cSSteven Whitehouse * @to: to here 13062ab9cd1cSSteven Whitehouse * 13072ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 13082ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 13092ab9cd1cSSteven Whitehouse * 13102ab9cd1cSSteven Whitehouse * Returns: errno 13112ab9cd1cSSteven Whitehouse */ 13122ab9cd1cSSteven Whitehouse 13132ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 13142ab9cd1cSSteven Whitehouse { 13152ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 13162ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 13172ab9cd1cSSteven Whitehouse struct inode *tmp; 13182ab9cd1cSSteven Whitehouse int error = 0; 13192ab9cd1cSSteven Whitehouse 13202ab9cd1cSSteven Whitehouse igrab(dir); 13212ab9cd1cSSteven Whitehouse 13222ab9cd1cSSteven Whitehouse for (;;) { 13232ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 13242ab9cd1cSSteven Whitehouse error = -EINVAL; 13252ab9cd1cSSteven Whitehouse break; 13262ab9cd1cSSteven Whitehouse } 13272b0143b5SDavid Howells if (dir == d_inode(sb->s_root)) { 13282ab9cd1cSSteven Whitehouse error = 0; 13292ab9cd1cSSteven Whitehouse break; 13302ab9cd1cSSteven Whitehouse } 13312ab9cd1cSSteven Whitehouse 13322ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 133348f8f711SAbhi Das if (!tmp) { 133448f8f711SAbhi Das error = -ENOENT; 133548f8f711SAbhi Das break; 133648f8f711SAbhi Das } 13372ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13382ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13392ab9cd1cSSteven Whitehouse break; 13402ab9cd1cSSteven Whitehouse } 13412ab9cd1cSSteven Whitehouse 13422ab9cd1cSSteven Whitehouse iput(dir); 13432ab9cd1cSSteven Whitehouse dir = tmp; 13442ab9cd1cSSteven Whitehouse } 13452ab9cd1cSSteven Whitehouse 13462ab9cd1cSSteven Whitehouse iput(dir); 13472ab9cd1cSSteven Whitehouse 13482ab9cd1cSSteven Whitehouse return error; 13492ab9cd1cSSteven Whitehouse } 13502ab9cd1cSSteven Whitehouse 13512ab9cd1cSSteven Whitehouse /** 1352a63b7bbcSBenjamin Marzinski * update_moved_ino - Update an inode that's being moved 1353a63b7bbcSBenjamin Marzinski * @ip: The inode being moved 1354a63b7bbcSBenjamin Marzinski * @ndip: The parent directory of the new filename 1355a63b7bbcSBenjamin Marzinski * @dir_rename: True of ip is a directory 1356a63b7bbcSBenjamin Marzinski * 1357a63b7bbcSBenjamin Marzinski * Returns: errno 1358a63b7bbcSBenjamin Marzinski */ 1359a63b7bbcSBenjamin Marzinski 1360a63b7bbcSBenjamin Marzinski static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1361a63b7bbcSBenjamin Marzinski int dir_rename) 1362a63b7bbcSBenjamin Marzinski { 1363a63b7bbcSBenjamin Marzinski if (dir_rename) 1364a63b7bbcSBenjamin Marzinski return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1365a63b7bbcSBenjamin Marzinski 1366078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 136783998ccdSAndreas Gruenbacher mark_inode_dirty_sync(&ip->i_inode); 1368a63b7bbcSBenjamin Marzinski return 0; 1369a63b7bbcSBenjamin Marzinski } 1370a63b7bbcSBenjamin Marzinski 1371a63b7bbcSBenjamin Marzinski 1372a63b7bbcSBenjamin Marzinski /** 13732ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13742ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13752ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13762ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13772ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13782ab9cd1cSSteven Whitehouse * 13792ab9cd1cSSteven Whitehouse * Returns: errno 13802ab9cd1cSSteven Whitehouse */ 13812ab9cd1cSSteven Whitehouse 13822ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13832ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13842ab9cd1cSSteven Whitehouse { 13852ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 13862ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 13872b0143b5SDavid Howells struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 13882ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 13892ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 1390bc74aaefSBob Peterson struct gfs2_holder ghs[4], r_gh, rd_gh; 13912ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 13922ab9cd1cSSteven Whitehouse unsigned int num_gh; 13932ab9cd1cSSteven Whitehouse int dir_rename = 0; 139419aeb5a6SBob Peterson struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 13952ab9cd1cSSteven Whitehouse unsigned int x; 13962ab9cd1cSSteven Whitehouse int error; 13972ab9cd1cSSteven Whitehouse 13986df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1399bc74aaefSBob Peterson gfs2_holder_mark_uninitialized(&rd_gh); 14002b0143b5SDavid Howells if (d_really_is_positive(ndentry)) { 14012b0143b5SDavid Howells nip = GFS2_I(d_inode(ndentry)); 14022ab9cd1cSSteven Whitehouse if (ip == nip) 14032ab9cd1cSSteven Whitehouse return 0; 14042ab9cd1cSSteven Whitehouse } 14052ab9cd1cSSteven Whitehouse 14065e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 14075e2f7d61SBob Peterson if (error) 14085e2f7d61SBob Peterson return error; 14095e2f7d61SBob Peterson 14102fba46a0SBob Peterson error = gfs2_qa_get(ndip); 14110a305e49SBob Peterson if (error) 14120a305e49SBob Peterson return error; 14130a305e49SBob Peterson 14142ab9cd1cSSteven Whitehouse if (odip != ndip) { 14152ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 14162ab9cd1cSSteven Whitehouse 0, &r_gh); 14172ab9cd1cSSteven Whitehouse if (error) 14182ab9cd1cSSteven Whitehouse goto out; 14192ab9cd1cSSteven Whitehouse 14202ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 14212ab9cd1cSSteven Whitehouse dir_rename = 1; 1422a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 14232ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 14242ab9cd1cSSteven Whitehouse if (error) 14252ab9cd1cSSteven Whitehouse goto out_gunlock_r; 14262ab9cd1cSSteven Whitehouse } 14272ab9cd1cSSteven Whitehouse } 14282ab9cd1cSSteven Whitehouse 14292ab9cd1cSSteven Whitehouse num_gh = 1; 1430ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 14312ab9cd1cSSteven Whitehouse if (odip != ndip) { 1432ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1433ad26967bSBob Peterson ghs + num_gh); 14342ab9cd1cSSteven Whitehouse num_gh++; 14352ab9cd1cSSteven Whitehouse } 1436ad26967bSBob Peterson gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 14372ab9cd1cSSteven Whitehouse num_gh++; 14382ab9cd1cSSteven Whitehouse 14392ab9cd1cSSteven Whitehouse if (nip) { 1440ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1441ad26967bSBob Peterson ghs + num_gh); 14422ab9cd1cSSteven Whitehouse num_gh++; 14432ab9cd1cSSteven Whitehouse } 14442ab9cd1cSSteven Whitehouse 14452ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 14462ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 14472ab9cd1cSSteven Whitehouse if (error) 14482ab9cd1cSSteven Whitehouse goto out_gunlock; 14492ab9cd1cSSteven Whitehouse } 1450ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1451ad26967bSBob Peterson if (error) 1452ad26967bSBob Peterson goto out_gunlock; 14532ab9cd1cSSteven Whitehouse 1454bc74aaefSBob Peterson if (nip) { 1455bc74aaefSBob Peterson /* Grab the resource group glock for unlink flag twiddling. 1456bc74aaefSBob Peterson * This is the case where the target dinode already exists 1457bc74aaefSBob Peterson * so we unlink before doing the rename. 1458bc74aaefSBob Peterson */ 1459bc74aaefSBob Peterson nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1460bc74aaefSBob Peterson if (!nrgd) { 1461bc74aaefSBob Peterson error = -ENOENT; 1462bc74aaefSBob Peterson goto out_gunlock; 1463bc74aaefSBob Peterson } 14644fc7ec31SBob Peterson error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 14654fc7ec31SBob Peterson LM_FLAG_NODE_SCOPE, &rd_gh); 1466bc74aaefSBob Peterson if (error) 1467bc74aaefSBob Peterson goto out_gunlock; 1468bc74aaefSBob Peterson } 1469bc74aaefSBob Peterson 14702ab9cd1cSSteven Whitehouse error = -ENOENT; 14712ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14722ab9cd1cSSteven Whitehouse goto out_gunlock; 14732ab9cd1cSSteven Whitehouse 14742ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14752ab9cd1cSSteven Whitehouse 14762ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14772ab9cd1cSSteven Whitehouse if (error) 14782ab9cd1cSSteven Whitehouse goto out_gunlock; 14792ab9cd1cSSteven Whitehouse 14802ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14812ab9cd1cSSteven Whitehouse 14822ab9cd1cSSteven Whitehouse if (nip) { 14832ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14842ab9cd1cSSteven Whitehouse if (error) 14852ab9cd1cSSteven Whitehouse goto out_gunlock; 14862ab9cd1cSSteven Whitehouse 14872ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 14882ab9cd1cSSteven Whitehouse error = -EAGAIN; 14892ab9cd1cSSteven Whitehouse goto out_gunlock; 14902ab9cd1cSSteven Whitehouse } 14912ab9cd1cSSteven Whitehouse 14922ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 14932ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 14942ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 14952ab9cd1cSSteven Whitehouse error = -EIO; 14962ab9cd1cSSteven Whitehouse goto out_gunlock; 14972ab9cd1cSSteven Whitehouse } 14982ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 14992ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 15002ab9cd1cSSteven Whitehouse goto out_gunlock; 15012ab9cd1cSSteven Whitehouse } 15022ab9cd1cSSteven Whitehouse } 15032ab9cd1cSSteven Whitehouse } else { 1504549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, ndir, 1505549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 15062ab9cd1cSSteven Whitehouse if (error) 15072ab9cd1cSSteven Whitehouse goto out_gunlock; 15082ab9cd1cSSteven Whitehouse 15092ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 15102ab9cd1cSSteven Whitehouse switch (error) { 15112ab9cd1cSSteven Whitehouse case -ENOENT: 15122ab9cd1cSSteven Whitehouse error = 0; 15132ab9cd1cSSteven Whitehouse break; 15142ab9cd1cSSteven Whitehouse case 0: 15152ab9cd1cSSteven Whitehouse error = -EEXIST; 1516e5966cf2SGustavo A. R. Silva goto out_gunlock; 15172ab9cd1cSSteven Whitehouse default: 15182ab9cd1cSSteven Whitehouse goto out_gunlock; 1519098b9c14SAliasgar Surti } 15202ab9cd1cSSteven Whitehouse 15212ab9cd1cSSteven Whitehouse if (odip != ndip) { 15222ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 15232ab9cd1cSSteven Whitehouse error = -ENOENT; 15242ab9cd1cSSteven Whitehouse goto out_gunlock; 15252ab9cd1cSSteven Whitehouse } 15262ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 15272ab9cd1cSSteven Whitehouse error = -EFBIG; 15282ab9cd1cSSteven Whitehouse goto out_gunlock; 15292ab9cd1cSSteven Whitehouse } 15302ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 15312ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 15322ab9cd1cSSteven Whitehouse error = -EMLINK; 15332ab9cd1cSSteven Whitehouse goto out_gunlock; 15342ab9cd1cSSteven Whitehouse } 15352ab9cd1cSSteven Whitehouse } 15362ab9cd1cSSteven Whitehouse } 15372ab9cd1cSSteven Whitehouse 15382ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 15392ab9cd1cSSteven Whitehouse 15402ab9cd1cSSteven Whitehouse if (dir_rename) { 1541549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, d_inode(odentry), 1542549c7297SChristian Brauner MAY_WRITE); 15432ab9cd1cSSteven Whitehouse if (error) 15442ab9cd1cSSteven Whitehouse goto out_gunlock; 15452ab9cd1cSSteven Whitehouse } 15462ab9cd1cSSteven Whitehouse 15473c1c0ae1SSteven Whitehouse if (nip == NULL) { 15483c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 15493c1c0ae1SSteven Whitehouse if (error) 15502ab9cd1cSSteven Whitehouse goto out_gunlock; 15513c1c0ae1SSteven Whitehouse } 15522ab9cd1cSSteven Whitehouse 15533c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 15543c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1555b8fbf471SAbhi Das error = gfs2_quota_lock_check(ndip, &ap); 15562ab9cd1cSSteven Whitehouse if (error) 15575407e242SBob Peterson goto out_gunlock; 15582ab9cd1cSSteven Whitehouse 15597b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 15602ab9cd1cSSteven Whitehouse if (error) 15612ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15622ab9cd1cSSteven Whitehouse 1563534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1564534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 15652ab9cd1cSSteven Whitehouse if (error) 15662ab9cd1cSSteven Whitehouse goto out_ipreserv; 15672ab9cd1cSSteven Whitehouse } else { 15682ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 15692ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 15702ab9cd1cSSteven Whitehouse if (error) 15712ab9cd1cSSteven Whitehouse goto out_gunlock; 15722ab9cd1cSSteven Whitehouse } 15732ab9cd1cSSteven Whitehouse 15742ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15752ab9cd1cSSteven Whitehouse 15764327a9bfSBob Peterson if (nip) 15774327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15782ab9cd1cSSteven Whitehouse 1579a63b7bbcSBenjamin Marzinski error = update_moved_ino(ip, ndip, dir_rename); 15802ab9cd1cSSteven Whitehouse if (error) 15812ab9cd1cSSteven Whitehouse goto out_end_trans; 15822ab9cd1cSSteven Whitehouse 15832ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15842ab9cd1cSSteven Whitehouse if (error) 15852ab9cd1cSSteven Whitehouse goto out_end_trans; 15862ab9cd1cSSteven Whitehouse 15872b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 15882ab9cd1cSSteven Whitehouse if (error) 15892ab9cd1cSSteven Whitehouse goto out_end_trans; 15902ab9cd1cSSteven Whitehouse 15912ab9cd1cSSteven Whitehouse out_end_trans: 15922ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 15932ab9cd1cSSteven Whitehouse out_ipreserv: 15943c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15952ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 15962ab9cd1cSSteven Whitehouse out_gunlock_q: 15973c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15982ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 15992ab9cd1cSSteven Whitehouse out_gunlock: 16002b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1601bc74aaefSBob Peterson if (gfs2_holder_initialized(&rd_gh)) 1602bc74aaefSBob Peterson gfs2_glock_dq_uninit(&rd_gh); 1603bc74aaefSBob Peterson 16042ab9cd1cSSteven Whitehouse while (x--) { 1605ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 16062ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 16072ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 16082ab9cd1cSSteven Whitehouse } 16092ab9cd1cSSteven Whitehouse out_gunlock_r: 16106df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 16112ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 16122ab9cd1cSSteven Whitehouse out: 16132fba46a0SBob Peterson gfs2_qa_put(ndip); 16142ab9cd1cSSteven Whitehouse return error; 16152ab9cd1cSSteven Whitehouse } 16162ab9cd1cSSteven Whitehouse 16172ab9cd1cSSteven Whitehouse /** 1618a63b7bbcSBenjamin Marzinski * gfs2_exchange - exchange two files 1619a63b7bbcSBenjamin Marzinski * @odir: Parent directory of old file name 1620a63b7bbcSBenjamin Marzinski * @odentry: The old dentry of the file 1621a63b7bbcSBenjamin Marzinski * @ndir: Parent directory of new file name 1622a63b7bbcSBenjamin Marzinski * @ndentry: The new dentry of the file 1623a63b7bbcSBenjamin Marzinski * @flags: The rename flags 1624a63b7bbcSBenjamin Marzinski * 1625a63b7bbcSBenjamin Marzinski * Returns: errno 1626a63b7bbcSBenjamin Marzinski */ 1627a63b7bbcSBenjamin Marzinski 1628a63b7bbcSBenjamin Marzinski static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1629a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1630a63b7bbcSBenjamin Marzinski unsigned int flags) 1631a63b7bbcSBenjamin Marzinski { 1632a63b7bbcSBenjamin Marzinski struct gfs2_inode *odip = GFS2_I(odir); 1633a63b7bbcSBenjamin Marzinski struct gfs2_inode *ndip = GFS2_I(ndir); 1634a63b7bbcSBenjamin Marzinski struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1635a63b7bbcSBenjamin Marzinski struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1636a63b7bbcSBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(odir); 1637ad26967bSBob Peterson struct gfs2_holder ghs[4], r_gh; 1638a63b7bbcSBenjamin Marzinski unsigned int num_gh; 1639a63b7bbcSBenjamin Marzinski unsigned int x; 1640a63b7bbcSBenjamin Marzinski umode_t old_mode = oip->i_inode.i_mode; 1641a63b7bbcSBenjamin Marzinski umode_t new_mode = nip->i_inode.i_mode; 1642a63b7bbcSBenjamin Marzinski int error; 1643a63b7bbcSBenjamin Marzinski 16446df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1645a63b7bbcSBenjamin Marzinski error = gfs2_rindex_update(sdp); 1646a63b7bbcSBenjamin Marzinski if (error) 1647a63b7bbcSBenjamin Marzinski return error; 1648a63b7bbcSBenjamin Marzinski 1649a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1650a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1651a63b7bbcSBenjamin Marzinski 0, &r_gh); 1652a63b7bbcSBenjamin Marzinski if (error) 1653a63b7bbcSBenjamin Marzinski goto out; 1654a63b7bbcSBenjamin Marzinski 1655a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1656a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1657a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(oip, ndip); 1658a63b7bbcSBenjamin Marzinski if (error) 1659a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1660a63b7bbcSBenjamin Marzinski } 1661a63b7bbcSBenjamin Marzinski 1662a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1663a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1664a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(nip, odip); 1665a63b7bbcSBenjamin Marzinski if (error) 1666a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1667a63b7bbcSBenjamin Marzinski } 1668a63b7bbcSBenjamin Marzinski } 1669a63b7bbcSBenjamin Marzinski 1670a63b7bbcSBenjamin Marzinski num_gh = 1; 1671ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1672a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1673ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1674ad26967bSBob Peterson ghs + num_gh); 1675a63b7bbcSBenjamin Marzinski num_gh++; 1676a63b7bbcSBenjamin Marzinski } 1677ad26967bSBob Peterson gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1678a63b7bbcSBenjamin Marzinski num_gh++; 1679a63b7bbcSBenjamin Marzinski 1680ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1681a63b7bbcSBenjamin Marzinski num_gh++; 1682a63b7bbcSBenjamin Marzinski 1683a63b7bbcSBenjamin Marzinski for (x = 0; x < num_gh; x++) { 1684a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq(ghs + x); 1685a63b7bbcSBenjamin Marzinski if (error) 1686a63b7bbcSBenjamin Marzinski goto out_gunlock; 1687a63b7bbcSBenjamin Marzinski } 1688a63b7bbcSBenjamin Marzinski 1689ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1690ad26967bSBob Peterson if (error) 1691ad26967bSBob Peterson goto out_gunlock; 1692ad26967bSBob Peterson 1693a63b7bbcSBenjamin Marzinski error = -ENOENT; 1694a63b7bbcSBenjamin Marzinski if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1695a63b7bbcSBenjamin Marzinski goto out_gunlock; 1696a63b7bbcSBenjamin Marzinski 1697a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1698a63b7bbcSBenjamin Marzinski if (error) 1699a63b7bbcSBenjamin Marzinski goto out_gunlock; 1700a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1701a63b7bbcSBenjamin Marzinski if (error) 1702a63b7bbcSBenjamin Marzinski goto out_gunlock; 1703a63b7bbcSBenjamin Marzinski 1704a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1705549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, odentry->d_inode, 1706549c7297SChristian Brauner MAY_WRITE); 1707a63b7bbcSBenjamin Marzinski if (error) 1708a63b7bbcSBenjamin Marzinski goto out_gunlock; 1709a63b7bbcSBenjamin Marzinski } 1710a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1711549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, ndentry->d_inode, 1712549c7297SChristian Brauner MAY_WRITE); 1713a63b7bbcSBenjamin Marzinski if (error) 1714a63b7bbcSBenjamin Marzinski goto out_gunlock; 1715a63b7bbcSBenjamin Marzinski } 1716a63b7bbcSBenjamin Marzinski error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1717a63b7bbcSBenjamin Marzinski if (error) 1718a63b7bbcSBenjamin Marzinski goto out_gunlock; 1719a63b7bbcSBenjamin Marzinski 1720a63b7bbcSBenjamin Marzinski error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1721a63b7bbcSBenjamin Marzinski if (error) 1722a63b7bbcSBenjamin Marzinski goto out_end_trans; 1723a63b7bbcSBenjamin Marzinski 1724a63b7bbcSBenjamin Marzinski error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1725a63b7bbcSBenjamin Marzinski if (error) 1726a63b7bbcSBenjamin Marzinski goto out_end_trans; 1727a63b7bbcSBenjamin Marzinski 1728a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1729a63b7bbcSBenjamin Marzinski IF2DT(old_mode)); 1730a63b7bbcSBenjamin Marzinski if (error) 1731a63b7bbcSBenjamin Marzinski goto out_end_trans; 1732a63b7bbcSBenjamin Marzinski 1733a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1734a63b7bbcSBenjamin Marzinski IF2DT(new_mode)); 1735a63b7bbcSBenjamin Marzinski if (error) 1736a63b7bbcSBenjamin Marzinski goto out_end_trans; 1737a63b7bbcSBenjamin Marzinski 1738a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1739a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1740a63b7bbcSBenjamin Marzinski inc_nlink(&odip->i_inode); 1741a63b7bbcSBenjamin Marzinski drop_nlink(&ndip->i_inode); 1742a63b7bbcSBenjamin Marzinski } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1743a63b7bbcSBenjamin Marzinski inc_nlink(&ndip->i_inode); 1744a63b7bbcSBenjamin Marzinski drop_nlink(&odip->i_inode); 1745a63b7bbcSBenjamin Marzinski } 1746a63b7bbcSBenjamin Marzinski } 1747a63b7bbcSBenjamin Marzinski mark_inode_dirty(&ndip->i_inode); 1748a63b7bbcSBenjamin Marzinski if (odip != ndip) 1749a63b7bbcSBenjamin Marzinski mark_inode_dirty(&odip->i_inode); 1750a63b7bbcSBenjamin Marzinski 1751a63b7bbcSBenjamin Marzinski out_end_trans: 1752a63b7bbcSBenjamin Marzinski gfs2_trans_end(sdp); 1753a63b7bbcSBenjamin Marzinski out_gunlock: 1754a63b7bbcSBenjamin Marzinski while (x--) { 1755ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 1756a63b7bbcSBenjamin Marzinski gfs2_glock_dq(ghs + x); 1757a63b7bbcSBenjamin Marzinski gfs2_holder_uninit(ghs + x); 1758a63b7bbcSBenjamin Marzinski } 1759a63b7bbcSBenjamin Marzinski out_gunlock_r: 17606df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 1761a63b7bbcSBenjamin Marzinski gfs2_glock_dq_uninit(&r_gh); 1762a63b7bbcSBenjamin Marzinski out: 1763a63b7bbcSBenjamin Marzinski return error; 1764a63b7bbcSBenjamin Marzinski } 1765a63b7bbcSBenjamin Marzinski 1766549c7297SChristian Brauner static int gfs2_rename2(struct user_namespace *mnt_userns, struct inode *odir, 1767549c7297SChristian Brauner struct dentry *odentry, struct inode *ndir, 1768549c7297SChristian Brauner struct dentry *ndentry, unsigned int flags) 1769a63b7bbcSBenjamin Marzinski { 1770a63b7bbcSBenjamin Marzinski flags &= ~RENAME_NOREPLACE; 1771a63b7bbcSBenjamin Marzinski 1772a63b7bbcSBenjamin Marzinski if (flags & ~RENAME_EXCHANGE) 1773a63b7bbcSBenjamin Marzinski return -EINVAL; 1774a63b7bbcSBenjamin Marzinski 1775a63b7bbcSBenjamin Marzinski if (flags & RENAME_EXCHANGE) 1776a63b7bbcSBenjamin Marzinski return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1777a63b7bbcSBenjamin Marzinski 1778a63b7bbcSBenjamin Marzinski return gfs2_rename(odir, odentry, ndir, ndentry); 1779a63b7bbcSBenjamin Marzinski } 1780a63b7bbcSBenjamin Marzinski 1781a63b7bbcSBenjamin Marzinski /** 17826b255391SAl Viro * gfs2_get_link - Follow a symbolic link 17832ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 17846b255391SAl Viro * @inode: The inode of the link 1785fceef393SAl Viro * @done: destructor for return value 17862ab9cd1cSSteven Whitehouse * 17872ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 17882ab9cd1cSSteven Whitehouse * 17892ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 17902ab9cd1cSSteven Whitehouse */ 17912ab9cd1cSSteven Whitehouse 17926b255391SAl Viro static const char *gfs2_get_link(struct dentry *dentry, 1793fceef393SAl Viro struct inode *inode, 1794fceef393SAl Viro struct delayed_call *done) 17952ab9cd1cSSteven Whitehouse { 17966b255391SAl Viro struct gfs2_inode *ip = GFS2_I(inode); 17972ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 17982ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1799160b4026SSteven Whitehouse unsigned int size; 18002ab9cd1cSSteven Whitehouse char *buf; 18012ab9cd1cSSteven Whitehouse int error; 18022ab9cd1cSSteven Whitehouse 18036b255391SAl Viro if (!dentry) 18046b255391SAl Viro return ERR_PTR(-ECHILD); 18056b255391SAl Viro 18062ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 18072ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 18082ab9cd1cSSteven Whitehouse if (error) { 18092ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 1810680baacbSAl Viro return ERR_PTR(error); 18112ab9cd1cSSteven Whitehouse } 18122ab9cd1cSSteven Whitehouse 18132ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 18142ab9cd1cSSteven Whitehouse if (size == 0) { 18152ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 18162ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 18172ab9cd1cSSteven Whitehouse goto out; 18182ab9cd1cSSteven Whitehouse } 18192ab9cd1cSSteven Whitehouse 18202ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 18212ab9cd1cSSteven Whitehouse if (error) { 18222ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 18232ab9cd1cSSteven Whitehouse goto out; 18242ab9cd1cSSteven Whitehouse } 18252ab9cd1cSSteven Whitehouse 1826160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 18272ab9cd1cSSteven Whitehouse if (!buf) 18282ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 18292ab9cd1cSSteven Whitehouse else 1830160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 18312ab9cd1cSSteven Whitehouse brelse(dibh); 18322ab9cd1cSSteven Whitehouse out: 18332ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 1834680baacbSAl Viro if (!IS_ERR(buf)) 1835fceef393SAl Viro set_delayed_call(done, kfree_link, buf); 1836680baacbSAl Viro return buf; 18372ab9cd1cSSteven Whitehouse } 18382ab9cd1cSSteven Whitehouse 18392ab9cd1cSSteven Whitehouse /** 1840c551f66cSLee Jones * gfs2_permission 1841c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 18422ab9cd1cSSteven Whitehouse * @inode: The inode 18432ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 18442ab9cd1cSSteven Whitehouse * 18452ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18462ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18472ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 18482ab9cd1cSSteven Whitehouse * 18492ab9cd1cSSteven Whitehouse * Returns: errno 18502ab9cd1cSSteven Whitehouse */ 18512ab9cd1cSSteven Whitehouse 1852549c7297SChristian Brauner int gfs2_permission(struct user_namespace *mnt_userns, struct inode *inode, 1853549c7297SChristian Brauner int mask) 18542ab9cd1cSSteven Whitehouse { 18552ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 18562ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18572ab9cd1cSSteven Whitehouse int error; 18582ab9cd1cSSteven Whitehouse 18596df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 18602ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 18612ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 186210556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 18632ab9cd1cSSteven Whitehouse return -ECHILD; 18642ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 18652ab9cd1cSSteven Whitehouse if (error) 18662ab9cd1cSSteven Whitehouse return error; 18672ab9cd1cSSteven Whitehouse } 18682ab9cd1cSSteven Whitehouse 18692ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1870337684a1SEryu Guan error = -EPERM; 18712ab9cd1cSSteven Whitehouse else 187247291baaSChristian Brauner error = generic_permission(&init_user_ns, inode, mask); 18736df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 18742ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 18752ab9cd1cSSteven Whitehouse 18762ab9cd1cSSteven Whitehouse return error; 18772ab9cd1cSSteven Whitehouse } 18782ab9cd1cSSteven Whitehouse 1879ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18802ab9cd1cSSteven Whitehouse { 18812f221d6fSChristian Brauner setattr_copy(&init_user_ns, inode, attr); 18822ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 18832ab9cd1cSSteven Whitehouse return 0; 18842ab9cd1cSSteven Whitehouse } 18852ab9cd1cSSteven Whitehouse 1886a4122a95SAndreas Gruenbacher static int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18872ab9cd1cSSteven Whitehouse { 18882ab9cd1cSSteven Whitehouse int error; 18892ab9cd1cSSteven Whitehouse 18902ab9cd1cSSteven Whitehouse if (current->journal_info) 1891ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 18922ab9cd1cSSteven Whitehouse 1893ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 18942ab9cd1cSSteven Whitehouse if (error) 18952ab9cd1cSSteven Whitehouse return error; 18962ab9cd1cSSteven Whitehouse 1897ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1898ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 18992ab9cd1cSSteven Whitehouse return error; 19002ab9cd1cSSteven Whitehouse } 19012ab9cd1cSSteven Whitehouse 19022ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 19032ab9cd1cSSteven Whitehouse { 19042ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19052ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 19067c06b5d6SEric W. Biederman kuid_t ouid, nuid; 19077c06b5d6SEric W. Biederman kgid_t ogid, ngid; 19082ab9cd1cSSteven Whitehouse int error; 1909b8fbf471SAbhi Das struct gfs2_alloc_parms ap; 19102ab9cd1cSSteven Whitehouse 19112ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 19122ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 19132ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 19142ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 19152ab9cd1cSSteven Whitehouse 19166b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1917f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 19186b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1919f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 19202fba46a0SBob Peterson error = gfs2_qa_get(ip); 192162e96cf8SBob Peterson if (error) 19222fba46a0SBob Peterson return error; 192362e96cf8SBob Peterson 192462e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 192562e96cf8SBob Peterson if (error) 192662e96cf8SBob Peterson goto out; 192762e96cf8SBob Peterson 192862e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 192962e96cf8SBob Peterson if (error) 193062e96cf8SBob Peterson goto out; 193162e96cf8SBob Peterson 1932b8fbf471SAbhi Das ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1933b8fbf471SAbhi Das 19346b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19356b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1936b8fbf471SAbhi Das error = gfs2_quota_check(ip, nuid, ngid, &ap); 19372ab9cd1cSSteven Whitehouse if (error) 19382ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19392ab9cd1cSSteven Whitehouse } 19402ab9cd1cSSteven Whitehouse 19412ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 19422ab9cd1cSSteven Whitehouse if (error) 19432ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19442ab9cd1cSSteven Whitehouse 1945ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 19462ab9cd1cSSteven Whitehouse if (error) 19472ab9cd1cSSteven Whitehouse goto out_end_trans; 19482ab9cd1cSSteven Whitehouse 19496b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19506b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 195139a72580SAbhi Das gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1952b8fbf471SAbhi Das gfs2_quota_change(ip, ap.target, nuid, ngid); 19532ab9cd1cSSteven Whitehouse } 19542ab9cd1cSSteven Whitehouse 19552ab9cd1cSSteven Whitehouse out_end_trans: 19562ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 19572ab9cd1cSSteven Whitehouse out_gunlock_q: 19582ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 195962e96cf8SBob Peterson out: 19602fba46a0SBob Peterson gfs2_qa_put(ip); 19612ab9cd1cSSteven Whitehouse return error; 19622ab9cd1cSSteven Whitehouse } 19632ab9cd1cSSteven Whitehouse 19642ab9cd1cSSteven Whitehouse /** 19652ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 1966c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 19672ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 19682ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 19692ab9cd1cSSteven Whitehouse * 19702ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 19712ab9cd1cSSteven Whitehouse * that change out to disk. 19722ab9cd1cSSteven Whitehouse * 19732ab9cd1cSSteven Whitehouse * Returns: errno 19742ab9cd1cSSteven Whitehouse */ 19752ab9cd1cSSteven Whitehouse 1976549c7297SChristian Brauner static int gfs2_setattr(struct user_namespace *mnt_userns, 1977549c7297SChristian Brauner struct dentry *dentry, struct iattr *attr) 19782ab9cd1cSSteven Whitehouse { 19792b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 19802ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19812ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 19822ab9cd1cSSteven Whitehouse int error; 19832ab9cd1cSSteven Whitehouse 19842fba46a0SBob Peterson error = gfs2_qa_get(ip); 19850a305e49SBob Peterson if (error) 19860a305e49SBob Peterson return error; 19870a305e49SBob Peterson 19882ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 19892ab9cd1cSSteven Whitehouse if (error) 19902fba46a0SBob Peterson goto out; 19912ab9cd1cSSteven Whitehouse 1992d75b9fa0SAndreas Gruenbacher error = may_setattr(&init_user_ns, inode, attr->ia_valid); 1993d75b9fa0SAndreas Gruenbacher if (error) 19942fba46a0SBob Peterson goto error; 19952ab9cd1cSSteven Whitehouse 19962f221d6fSChristian Brauner error = setattr_prepare(&init_user_ns, dentry, attr); 19972ab9cd1cSSteven Whitehouse if (error) 19982fba46a0SBob Peterson goto error; 19992ab9cd1cSSteven Whitehouse 20002ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 20012ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 20022ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 20032ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 2004e01580bfSChristoph Hellwig else { 2005ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 2006e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 2007e65ce2a5SChristian Brauner error = posix_acl_chmod(&init_user_ns, inode, 2008e65ce2a5SChristian Brauner inode->i_mode); 2009e01580bfSChristoph Hellwig } 20102ab9cd1cSSteven Whitehouse 20112fba46a0SBob Peterson error: 20122ab9cd1cSSteven Whitehouse if (!error) 20132ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 2014ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 20152fba46a0SBob Peterson out: 20162fba46a0SBob Peterson gfs2_qa_put(ip); 20172ab9cd1cSSteven Whitehouse return error; 20182ab9cd1cSSteven Whitehouse } 20192ab9cd1cSSteven Whitehouse 20202ab9cd1cSSteven Whitehouse /** 20212ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 2022549c7297SChristian Brauner * @mnt_userns: user namespace of the mount the inode was found from 2023a528d35eSDavid Howells * @path: Object to query 20242ab9cd1cSSteven Whitehouse * @stat: The inode's stats 2025a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 2026a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 20272ab9cd1cSSteven Whitehouse * 20282ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 20292ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 20302ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 20312ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 20322ab9cd1cSSteven Whitehouse * with the glock already held. 20332ab9cd1cSSteven Whitehouse * 20342ab9cd1cSSteven Whitehouse * Returns: errno 20352ab9cd1cSSteven Whitehouse */ 20362ab9cd1cSSteven Whitehouse 2037549c7297SChristian Brauner static int gfs2_getattr(struct user_namespace *mnt_userns, 2038549c7297SChristian Brauner const struct path *path, struct kstat *stat, 2039a528d35eSDavid Howells u32 request_mask, unsigned int flags) 20402ab9cd1cSSteven Whitehouse { 2041a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 20422ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20432ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 2044b2623c2fSAndreas Gruenbacher u32 gfsflags; 20452ab9cd1cSSteven Whitehouse int error; 20462ab9cd1cSSteven Whitehouse 20476df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 20482ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 20492ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 20502ab9cd1cSSteven Whitehouse if (error) 20512ab9cd1cSSteven Whitehouse return error; 20522ab9cd1cSSteven Whitehouse } 20532ab9cd1cSSteven Whitehouse 2054b2623c2fSAndreas Gruenbacher gfsflags = ip->i_diskflags; 2055b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_APPENDONLY) 2056b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_APPEND; 2057b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_IMMUTABLE) 2058b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_IMMUTABLE; 2059b2623c2fSAndreas Gruenbacher 2060b2623c2fSAndreas Gruenbacher stat->attributes_mask |= (STATX_ATTR_APPEND | 2061b2623c2fSAndreas Gruenbacher STATX_ATTR_COMPRESSED | 2062b2623c2fSAndreas Gruenbacher STATX_ATTR_ENCRYPTED | 2063b2623c2fSAndreas Gruenbacher STATX_ATTR_IMMUTABLE | 2064b2623c2fSAndreas Gruenbacher STATX_ATTR_NODUMP); 2065b2623c2fSAndreas Gruenbacher 20660d56a451SChristian Brauner generic_fillattr(&init_user_ns, inode, stat); 2067b2623c2fSAndreas Gruenbacher 20686df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 20692ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 20702ab9cd1cSSteven Whitehouse 20712ab9cd1cSSteven Whitehouse return 0; 20722ab9cd1cSSteven Whitehouse } 20732ab9cd1cSSteven Whitehouse 20742ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 20752ab9cd1cSSteven Whitehouse u64 start, u64 len) 20762ab9cd1cSSteven Whitehouse { 20772ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20782ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 20792ab9cd1cSSteven Whitehouse int ret; 20802ab9cd1cSSteven Whitehouse 2081aac1a55bSBob Peterson inode_lock_shared(inode); 20822ab9cd1cSSteven Whitehouse 20832ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20842ab9cd1cSSteven Whitehouse if (ret) 20852ab9cd1cSSteven Whitehouse goto out; 20862ab9cd1cSSteven Whitehouse 2087aac1a55bSBob Peterson ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 20882ab9cd1cSSteven Whitehouse 20892ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 2090aac1a55bSBob Peterson 20912ab9cd1cSSteven Whitehouse out: 2092aac1a55bSBob Peterson inode_unlock_shared(inode); 20932ab9cd1cSSteven Whitehouse return ret; 20942ab9cd1cSSteven Whitehouse } 20952ab9cd1cSSteven Whitehouse 20963a27411cSAndreas Gruenbacher loff_t gfs2_seek_data(struct file *file, loff_t offset) 20973a27411cSAndreas Gruenbacher { 20983a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 20993a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21003a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21013a27411cSAndreas Gruenbacher loff_t ret; 21023a27411cSAndreas Gruenbacher 21033a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21043a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21053a27411cSAndreas Gruenbacher if (!ret) 21063a27411cSAndreas Gruenbacher ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 21073a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21083a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21093a27411cSAndreas Gruenbacher 21103a27411cSAndreas Gruenbacher if (ret < 0) 21113a27411cSAndreas Gruenbacher return ret; 21123a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21133a27411cSAndreas Gruenbacher } 21143a27411cSAndreas Gruenbacher 21153a27411cSAndreas Gruenbacher loff_t gfs2_seek_hole(struct file *file, loff_t offset) 21163a27411cSAndreas Gruenbacher { 21173a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21183a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21193a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21203a27411cSAndreas Gruenbacher loff_t ret; 21213a27411cSAndreas Gruenbacher 21223a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21233a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21243a27411cSAndreas Gruenbacher if (!ret) 21253a27411cSAndreas Gruenbacher ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 21263a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21273a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21283a27411cSAndreas Gruenbacher 21293a27411cSAndreas Gruenbacher if (ret < 0) 21303a27411cSAndreas Gruenbacher return ret; 21313a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21323a27411cSAndreas Gruenbacher } 21333a27411cSAndreas Gruenbacher 213482e938bdSAndreas Gruenbacher static int gfs2_update_time(struct inode *inode, struct timespec64 *time, 213582e938bdSAndreas Gruenbacher int flags) 213682e938bdSAndreas Gruenbacher { 213782e938bdSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 213882e938bdSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_gl; 213982e938bdSAndreas Gruenbacher struct gfs2_holder *gh; 214082e938bdSAndreas Gruenbacher int error; 214182e938bdSAndreas Gruenbacher 214282e938bdSAndreas Gruenbacher gh = gfs2_glock_is_locked_by_me(gl); 214382e938bdSAndreas Gruenbacher if (gh && !gfs2_glock_is_held_excl(gl)) { 214482e938bdSAndreas Gruenbacher gfs2_glock_dq(gh); 214582e938bdSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); 214682e938bdSAndreas Gruenbacher error = gfs2_glock_nq(gh); 214782e938bdSAndreas Gruenbacher if (error) 214882e938bdSAndreas Gruenbacher return error; 214982e938bdSAndreas Gruenbacher } 215082e938bdSAndreas Gruenbacher return generic_update_time(inode, time, flags); 215182e938bdSAndreas Gruenbacher } 215282e938bdSAndreas Gruenbacher 2153e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops = { 21542ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21552ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21562ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21572ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21582ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21594e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 2160e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 216182e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 216288b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 216388b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21642ab9cd1cSSteven Whitehouse }; 21652ab9cd1cSSteven Whitehouse 2166e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops = { 21672ab9cd1cSSteven Whitehouse .create = gfs2_create, 21682ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 21692ab9cd1cSSteven Whitehouse .link = gfs2_link, 21702ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 21712ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 21722ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 21732ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 21742ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 21752773bf00SMiklos Szeredi .rename = gfs2_rename2, 21762ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21772ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21782ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21792ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21802ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21814e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 2182e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 218382e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21846d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 218588b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 218688b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21872ab9cd1cSSteven Whitehouse }; 21882ab9cd1cSSteven Whitehouse 2189e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops = { 21906b255391SAl Viro .get_link = gfs2_get_link, 21912ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21922ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21932ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21942ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21952ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21962ab9cd1cSSteven Whitehouse }; 21972ab9cd1cSSteven Whitehouse 2198