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 39cda9dd42SAndreas Gruenbacher static int iget_test(struct inode *inode, void *opaque) 402ab9cd1cSSteven Whitehouse { 41cda9dd42SAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 42cda9dd42SAndreas Gruenbacher 43cda9dd42SAndreas Gruenbacher return GFS2_I(inode)->i_no_addr == no_addr; 44cda9dd42SAndreas Gruenbacher } 45cda9dd42SAndreas Gruenbacher 46cda9dd42SAndreas Gruenbacher static int iget_set(struct inode *inode, void *opaque) 47cda9dd42SAndreas Gruenbacher { 48cda9dd42SAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 49cda9dd42SAndreas Gruenbacher 50cda9dd42SAndreas Gruenbacher GFS2_I(inode)->i_no_addr = no_addr; 51cda9dd42SAndreas Gruenbacher inode->i_ino = no_addr; 52cda9dd42SAndreas Gruenbacher return 0; 53cda9dd42SAndreas Gruenbacher } 54cda9dd42SAndreas Gruenbacher 553ce37b2cSAndreas Gruenbacher static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) 563ce37b2cSAndreas Gruenbacher { 573ce37b2cSAndreas Gruenbacher struct inode *inode; 583ce37b2cSAndreas Gruenbacher 593ce37b2cSAndreas Gruenbacher repeat: 60cda9dd42SAndreas Gruenbacher inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 613ce37b2cSAndreas Gruenbacher if (!inode) 623ce37b2cSAndreas Gruenbacher return inode; 633ce37b2cSAndreas Gruenbacher if (is_bad_inode(inode)) { 643ce37b2cSAndreas Gruenbacher iput(inode); 653ce37b2cSAndreas Gruenbacher goto repeat; 663ce37b2cSAndreas Gruenbacher } 673ce37b2cSAndreas Gruenbacher return inode; 682ab9cd1cSSteven Whitehouse } 692ab9cd1cSSteven Whitehouse 702ab9cd1cSSteven Whitehouse /** 712ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 722ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 732ab9cd1cSSteven Whitehouse * 742ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 752ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 762ab9cd1cSSteven Whitehouse */ 772ab9cd1cSSteven Whitehouse 782ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 792ab9cd1cSSteven Whitehouse { 802ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 812ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 822ab9cd1cSSteven Whitehouse 832ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 842ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 852ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 862ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 872ab9cd1cSSteven Whitehouse else 882ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 892ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 902ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 912ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 922ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 932ab9cd1cSSteven Whitehouse else 942ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 952ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 962ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 972ab9cd1cSSteven Whitehouse } else { 982ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 992ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 1002ab9cd1cSSteven Whitehouse } 1012ab9cd1cSSteven Whitehouse } 1022ab9cd1cSSteven Whitehouse 1032ab9cd1cSSteven Whitehouse /** 1042ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 1052ab9cd1cSSteven Whitehouse * @sb: The super block 1062ab9cd1cSSteven Whitehouse * @type: The type of the inode 1073ce37b2cSAndreas Gruenbacher * @no_addr: The inode number 1083ce37b2cSAndreas Gruenbacher * @no_formal_ino: The inode generation number 1093ce37b2cSAndreas Gruenbacher * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 11061b91cfdSAndreas Gruenbacher * GFS2_BLKST_FREE to indicate not to verify) 1113ce37b2cSAndreas Gruenbacher * 1123ce37b2cSAndreas Gruenbacher * If @type is DT_UNKNOWN, the inode type is fetched from disk. 1133ce37b2cSAndreas Gruenbacher * 1143ce37b2cSAndreas Gruenbacher * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 1153ce37b2cSAndreas Gruenbacher * placeholder because it doesn't otherwise make sense), the on-disk block type 1163ce37b2cSAndreas Gruenbacher * is verified to be @blktype. 1172ab9cd1cSSteven Whitehouse * 118b66648adSAndreas Gruenbacher * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE) 119b66648adSAndreas Gruenbacher * if it detects that @no_formal_ino doesn't match the actual inode generation 120b66648adSAndreas Gruenbacher * number. However, it doesn't always know unless @type is DT_UNKNOWN. 121b66648adSAndreas Gruenbacher * 1222ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1232ab9cd1cSSteven Whitehouse */ 1242ab9cd1cSSteven Whitehouse 1252ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1263ce37b2cSAndreas Gruenbacher u64 no_addr, u64 no_formal_ino, 1273ce37b2cSAndreas Gruenbacher unsigned int blktype) 1282ab9cd1cSSteven Whitehouse { 1292ab9cd1cSSteven Whitehouse struct inode *inode; 1302ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1312ab9cd1cSSteven Whitehouse struct gfs2_glock *io_gl = NULL; 1323ce37b2cSAndreas Gruenbacher struct gfs2_holder i_gh; 1332ab9cd1cSSteven Whitehouse int error; 1342ab9cd1cSSteven Whitehouse 1356df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 1363ce37b2cSAndreas Gruenbacher inode = gfs2_iget(sb, no_addr); 1372ab9cd1cSSteven Whitehouse if (!inode) 138ac3beb6aSSteven Whitehouse return ERR_PTR(-ENOMEM); 1392ab9cd1cSSteven Whitehouse 140e97321faSBob Peterson ip = GFS2_I(inode); 141e97321faSBob Peterson 1422ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1432ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1442ab9cd1cSSteven Whitehouse 1452ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 1462ab9cd1cSSteven Whitehouse if (unlikely(error)) 1472ab9cd1cSSteven Whitehouse goto fail; 1484fd1a579SAndreas Gruenbacher flush_delayed_work(&ip->i_gl->gl_work); 1492ab9cd1cSSteven Whitehouse 1502ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 1512ab9cd1cSSteven Whitehouse if (unlikely(error)) 15240e7e86eSAndreas Gruenbacher goto fail; 1532ab9cd1cSSteven Whitehouse 1543ce37b2cSAndreas Gruenbacher if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 1553ce37b2cSAndreas Gruenbacher /* 1563ce37b2cSAndreas Gruenbacher * The GL_SKIP flag indicates to skip reading the inode 1573ce37b2cSAndreas Gruenbacher * block. We read the inode with gfs2_inode_refresh 1583ce37b2cSAndreas Gruenbacher * after possibly checking the block type. 1593ce37b2cSAndreas Gruenbacher */ 1603ce37b2cSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 1613ce37b2cSAndreas Gruenbacher GL_SKIP, &i_gh); 1623ce37b2cSAndreas Gruenbacher if (error) 16340e7e86eSAndreas Gruenbacher goto fail; 1643ce37b2cSAndreas Gruenbacher 165b66648adSAndreas Gruenbacher error = -ESTALE; 166b66648adSAndreas Gruenbacher if (no_formal_ino && 167b66648adSAndreas Gruenbacher gfs2_inode_already_deleted(ip->i_gl, no_formal_ino)) 168b66648adSAndreas Gruenbacher goto fail; 169b66648adSAndreas Gruenbacher 1703ce37b2cSAndreas Gruenbacher if (blktype != GFS2_BLKST_FREE) { 1713ce37b2cSAndreas Gruenbacher error = gfs2_check_blk_type(sdp, no_addr, 1723ce37b2cSAndreas Gruenbacher blktype); 1733ce37b2cSAndreas Gruenbacher if (error) 17440e7e86eSAndreas Gruenbacher goto fail; 1753ce37b2cSAndreas Gruenbacher } 1763ce37b2cSAndreas Gruenbacher } 1773ce37b2cSAndreas Gruenbacher 1784d7c18c7SBob Peterson glock_set_object(ip->i_gl, ip); 1792ab9cd1cSSteven Whitehouse set_bit(GIF_INVALID, &ip->i_flags); 1802ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 1812ab9cd1cSSteven Whitehouse if (unlikely(error)) 18240e7e86eSAndreas Gruenbacher goto fail; 1836bd1c7bdSAndreas Gruenbacher if (blktype != GFS2_BLKST_UNLINKED) 184a0e3cc65SAndreas Gruenbacher gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl); 1854fd1a579SAndreas Gruenbacher glock_set_object(ip->i_iopen_gh.gh_gl, ip); 1862ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1872ab9cd1cSSteven Whitehouse io_gl = NULL; 1882ab9cd1cSSteven Whitehouse 1892b0fb353SAndreas Gruenbacher /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 1902b0fb353SAndreas Gruenbacher inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 1912b0fb353SAndreas Gruenbacher inode->i_atime.tv_nsec = 0; 1922b0fb353SAndreas Gruenbacher 1932ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1942ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 1952ab9cd1cSSteven Whitehouse error = gfs2_inode_refresh(GFS2_I(inode)); 1962ab9cd1cSSteven Whitehouse if (error) 19740e7e86eSAndreas Gruenbacher goto fail; 1982ab9cd1cSSteven Whitehouse } else { 1992b0fb353SAndreas Gruenbacher ip->i_no_formal_ino = no_formal_ino; 2002ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 2012ab9cd1cSSteven Whitehouse } 2022ab9cd1cSSteven Whitehouse 2036df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2043ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 205b66648adSAndreas Gruenbacher 206b66648adSAndreas Gruenbacher gfs2_set_iop(inode); 207b66648adSAndreas Gruenbacher } 208b66648adSAndreas Gruenbacher 209b66648adSAndreas Gruenbacher if (no_formal_ino && ip->i_no_formal_ino && 210b66648adSAndreas Gruenbacher no_formal_ino != ip->i_no_formal_ino) { 2115902f4ddSAndreas Gruenbacher error = -ESTALE; 212b66648adSAndreas Gruenbacher if (inode->i_state & I_NEW) 213b66648adSAndreas Gruenbacher goto fail; 214b66648adSAndreas Gruenbacher iput(inode); 2155902f4ddSAndreas Gruenbacher return ERR_PTR(error); 216b66648adSAndreas Gruenbacher } 217b66648adSAndreas Gruenbacher 218b66648adSAndreas Gruenbacher if (inode->i_state & I_NEW) 219b66648adSAndreas Gruenbacher unlock_new_inode(inode); 220b66648adSAndreas Gruenbacher 2212ab9cd1cSSteven Whitehouse return inode; 2222ab9cd1cSSteven Whitehouse 22340e7e86eSAndreas Gruenbacher fail: 2242ab9cd1cSSteven Whitehouse if (io_gl) 2252ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 2266df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2273ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 2282ab9cd1cSSteven Whitehouse iget_failed(inode); 2292ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2302ab9cd1cSSteven Whitehouse } 2312ab9cd1cSSteven Whitehouse 2326bdcadeaSAndreas Gruenbacher /** 2336bdcadeaSAndreas Gruenbacher * gfs2_lookup_by_inum - look up an inode by inode number 2346bdcadeaSAndreas Gruenbacher * @sdp: The super block 2356bdcadeaSAndreas Gruenbacher * @no_addr: The inode number 2366bdcadeaSAndreas Gruenbacher * @no_formal_ino: The inode generation number (0 for any) 2376bdcadeaSAndreas Gruenbacher * @blktype: Requested block type (see gfs2_inode_lookup) 2386bdcadeaSAndreas Gruenbacher */ 2392ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2406bdcadeaSAndreas Gruenbacher u64 no_formal_ino, unsigned int blktype) 2412ab9cd1cSSteven Whitehouse { 2422ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2433ce37b2cSAndreas Gruenbacher struct inode *inode; 2442ab9cd1cSSteven Whitehouse int error; 2452ab9cd1cSSteven Whitehouse 246b66648adSAndreas Gruenbacher inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, 247b66648adSAndreas Gruenbacher blktype); 2482ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2493ce37b2cSAndreas Gruenbacher return inode; 2502ab9cd1cSSteven Whitehouse 2512ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2522ab9cd1cSSteven Whitehouse error = -EIO; 2532ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2542ab9cd1cSSteven Whitehouse goto fail_iput; 2552ab9cd1cSSteven Whitehouse } 2563ce37b2cSAndreas Gruenbacher return inode; 2572ab9cd1cSSteven Whitehouse 2582ab9cd1cSSteven Whitehouse fail_iput: 2592ab9cd1cSSteven Whitehouse iput(inode); 2603ce37b2cSAndreas Gruenbacher return ERR_PTR(error); 2612ab9cd1cSSteven Whitehouse } 2622ab9cd1cSSteven Whitehouse 2632ab9cd1cSSteven Whitehouse 2642ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2652ab9cd1cSSteven Whitehouse { 2662ab9cd1cSSteven Whitehouse struct qstr qstr; 2672ab9cd1cSSteven Whitehouse struct inode *inode; 2682ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2692ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2702ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2712ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2722ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2732ab9cd1cSSteven Whitehouse * and do not check for NULL. 2742ab9cd1cSSteven Whitehouse */ 2752ab9cd1cSSteven Whitehouse if (inode == NULL) 2762ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2772ab9cd1cSSteven Whitehouse else 2782ab9cd1cSSteven Whitehouse return inode; 2792ab9cd1cSSteven Whitehouse } 2802ab9cd1cSSteven Whitehouse 2812ab9cd1cSSteven Whitehouse 2822ab9cd1cSSteven Whitehouse /** 2832ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 2842ab9cd1cSSteven Whitehouse * @d_gh: An initialized holder for the directory glock 2852ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2862ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2872ab9cd1cSSteven Whitehouse * @i_gh: An uninitialized holder for the new inode glock 2882ab9cd1cSSteven Whitehouse * 2892ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2902ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2912ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2922ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2932ab9cd1cSSteven Whitehouse * 2942ab9cd1cSSteven Whitehouse * Returns: errno 2952ab9cd1cSSteven Whitehouse */ 2962ab9cd1cSSteven Whitehouse 2972ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 2982ab9cd1cSSteven Whitehouse int is_root) 2992ab9cd1cSSteven Whitehouse { 3002ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 3012ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 3022ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 3032ab9cd1cSSteven Whitehouse int error = 0; 3042ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 3052ab9cd1cSSteven Whitehouse 3066df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&d_gh); 3072ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 3082ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 3092ab9cd1cSSteven Whitehouse 3102ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 3112ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 3122b0143b5SDavid Howells dir == d_inode(sb->s_root))) { 3132ab9cd1cSSteven Whitehouse igrab(dir); 3142ab9cd1cSSteven Whitehouse return dir; 3152ab9cd1cSSteven Whitehouse } 3162ab9cd1cSSteven Whitehouse 3172ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3182ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3192ab9cd1cSSteven Whitehouse if (error) 3202ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3212ab9cd1cSSteven Whitehouse } 3222ab9cd1cSSteven Whitehouse 3232ab9cd1cSSteven Whitehouse if (!is_root) { 32410556cb2SAl Viro error = gfs2_permission(dir, MAY_EXEC); 3252ab9cd1cSSteven Whitehouse if (error) 3262ab9cd1cSSteven Whitehouse goto out; 3272ab9cd1cSSteven Whitehouse } 3282ab9cd1cSSteven Whitehouse 3295a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3302ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3312ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3322ab9cd1cSSteven Whitehouse out: 3336df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&d_gh)) 3342ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3352ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3362ab9cd1cSSteven Whitehouse return NULL; 3372ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3382ab9cd1cSSteven Whitehouse } 3392ab9cd1cSSteven Whitehouse 3402ab9cd1cSSteven Whitehouse /** 3412ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3422ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3432ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3442ab9cd1cSSteven Whitehouse * @mode: 3452ab9cd1cSSteven Whitehouse * 3462ab9cd1cSSteven Whitehouse * Returns: errno 3472ab9cd1cSSteven Whitehouse */ 3482ab9cd1cSSteven Whitehouse 3492ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 350175a4eb7SAl Viro umode_t mode) 3512ab9cd1cSSteven Whitehouse { 3522ab9cd1cSSteven Whitehouse int error; 3532ab9cd1cSSteven Whitehouse 35410556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 3552ab9cd1cSSteven Whitehouse if (error) 3562ab9cd1cSSteven Whitehouse return error; 3572ab9cd1cSSteven Whitehouse 3582ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3592ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3602ab9cd1cSSteven Whitehouse return -ENOENT; 3612ab9cd1cSSteven Whitehouse 3622ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3632ab9cd1cSSteven Whitehouse return -EFBIG; 3642ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3652ab9cd1cSSteven Whitehouse return -EMLINK; 3662ab9cd1cSSteven Whitehouse 3672ab9cd1cSSteven Whitehouse return 0; 3682ab9cd1cSSteven Whitehouse } 3692ab9cd1cSSteven Whitehouse 370c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 371c9aecf73SSteven Whitehouse struct inode *inode) 3722ab9cd1cSSteven Whitehouse { 3732ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3746b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3756b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 376c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 377c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3786b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 379c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 380c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3812ab9cd1cSSteven Whitehouse } else 382c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3832ab9cd1cSSteven Whitehouse 3842ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 385c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 386c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 387c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3882ab9cd1cSSteven Whitehouse } else 389c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3902ab9cd1cSSteven Whitehouse } 3912ab9cd1cSSteven Whitehouse 392b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 3932ab9cd1cSSteven Whitehouse { 394c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 395b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 3962ab9cd1cSSteven Whitehouse int error; 3972ab9cd1cSSteven Whitehouse 398b8fbf471SAbhi Das error = gfs2_quota_lock_check(ip, &ap); 3992ab9cd1cSSteven Whitehouse if (error) 4002ab9cd1cSSteven Whitehouse goto out; 4012ab9cd1cSSteven Whitehouse 4027b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 403fd4b4e04SSteven Whitehouse if (error) 404fd4b4e04SSteven Whitehouse goto out_quota; 405fd4b4e04SSteven Whitehouse 406b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 4072ab9cd1cSSteven Whitehouse if (error) 4082ab9cd1cSSteven Whitehouse goto out_ipreserv; 4092ab9cd1cSSteven Whitehouse 410b2c8b3eaSSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 411c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 412c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 413c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 4142ab9cd1cSSteven Whitehouse 4152ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4162ab9cd1cSSteven Whitehouse 4172ab9cd1cSSteven Whitehouse out_ipreserv: 418c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 419fd4b4e04SSteven Whitehouse out_quota: 420fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4212ab9cd1cSSteven Whitehouse out: 4222ab9cd1cSSteven Whitehouse return error; 4232ab9cd1cSSteven Whitehouse } 4242ab9cd1cSSteven Whitehouse 425f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 426f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 427e2d0a13bSSteven Whitehouse { 428e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 429e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 430e2d0a13bSSteven Whitehouse 431e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 432e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 433e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 434e2d0a13bSSteven Whitehouse 435e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 436e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 437e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 438e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 439e2d0a13bSSteven Whitehouse 440e2d0a13bSSteven Whitehouse } 441e2d0a13bSSteven Whitehouse 4422ab9cd1cSSteven Whitehouse /** 443b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 444b2c8b3eaSSteven Whitehouse * @ip: The inode in question 445b2c8b3eaSSteven Whitehouse * 446b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 447b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 448b2c8b3eaSSteven Whitehouse */ 449b2c8b3eaSSteven Whitehouse 450b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 451b2c8b3eaSSteven Whitehouse { 452b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 453b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 454b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 455b2c8b3eaSSteven Whitehouse 456b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 457b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 458b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 459b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 460b2c8b3eaSSteven Whitehouse 461b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 462b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 463b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 464b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 465b2c8b3eaSSteven Whitehouse 466b2c8b3eaSSteven Whitehouse brelse(bh); 467b2c8b3eaSSteven Whitehouse } 468b2c8b3eaSSteven Whitehouse 469b2c8b3eaSSteven Whitehouse /** 4702ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 471f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 472c9aecf73SSteven Whitehouse * @ip: The inode 473f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 474f2741d98SSteven Whitehouse * @bhp: The buffer head (returned to caller) 4752ab9cd1cSSteven Whitehouse * 4762ab9cd1cSSteven Whitehouse */ 4772ab9cd1cSSteven Whitehouse 478c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 47979ba7480SSteven Whitehouse const char *symname) 4802ab9cd1cSSteven Whitehouse { 4812ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4822ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4832ab9cd1cSSteven Whitehouse 484c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 485350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4862ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 48779ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4882ab9cd1cSSteven Whitehouse 489c9aecf73SSteven Whitehouse di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 490c9aecf73SSteven Whitehouse di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 4912ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4922ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4932ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4942ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4952ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 49679ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 4972ab9cd1cSSteven Whitehouse 498c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 499160b4026SSteven Whitehouse case S_IFDIR: 500e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 501160b4026SSteven Whitehouse break; 502160b4026SSteven Whitehouse case S_IFLNK: 503c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 504160b4026SSteven Whitehouse break; 505e2d0a13bSSteven Whitehouse } 506e2d0a13bSSteven Whitehouse 5072ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 50879ba7480SSteven Whitehouse brelse(dibh); 5092ab9cd1cSSteven Whitehouse } 5102ab9cd1cSSteven Whitehouse 511534cf9caSSteven Whitehouse /** 512534cf9caSSteven Whitehouse * gfs2_trans_da_blocks - Calculate number of blocks to link inode 513534cf9caSSteven Whitehouse * @dip: The directory we are linking into 514534cf9caSSteven Whitehouse * @da: The dir add information 515534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 516534cf9caSSteven Whitehouse * 517534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 518534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 519534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 520534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 521534cf9caSSteven Whitehouse * 522534cf9caSSteven Whitehouse * Returns: Number of blocks 523534cf9caSSteven Whitehouse */ 524534cf9caSSteven Whitehouse 525534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 526534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 527534cf9caSSteven Whitehouse unsigned nr_inodes) 528534cf9caSSteven Whitehouse { 529534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 530534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 531534cf9caSSteven Whitehouse } 532534cf9caSSteven Whitehouse 5332ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5343c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5352ab9cd1cSSteven Whitehouse { 5362ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5373c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5382ab9cd1cSSteven Whitehouse int error; 5392ab9cd1cSSteven Whitehouse 5403c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 541b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 5422ab9cd1cSSteven Whitehouse if (error) 5432ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5442ab9cd1cSSteven Whitehouse 5457b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5462ab9cd1cSSteven Whitehouse if (error) 5472ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5482ab9cd1cSSteven Whitehouse 549534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5502ab9cd1cSSteven Whitehouse if (error) 5512ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5522ab9cd1cSSteven Whitehouse } else { 5532ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5542ab9cd1cSSteven Whitehouse if (error) 5552ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5562ab9cd1cSSteven Whitehouse } 5572ab9cd1cSSteven Whitehouse 5582b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5592ab9cd1cSSteven Whitehouse 5602ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5612ab9cd1cSSteven Whitehouse fail_ipreserv: 5622ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5632ab9cd1cSSteven Whitehouse fail_quota_locks: 5642ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5652ab9cd1cSSteven Whitehouse return error; 5662ab9cd1cSSteven Whitehouse } 5672ab9cd1cSSteven Whitehouse 56846cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5699d8f13baSMimi Zohar void *fs_info) 5702ab9cd1cSSteven Whitehouse { 5719d8f13baSMimi Zohar const struct xattr *xattr; 5729d8f13baSMimi Zohar int err = 0; 5732ab9cd1cSSteven Whitehouse 5749d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5759d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5769d8f13baSMimi Zohar xattr->value_len, 0, 5779d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5789d8f13baSMimi Zohar if (err < 0) 5799d8f13baSMimi Zohar break; 5809d8f13baSMimi Zohar } 5812ab9cd1cSSteven Whitehouse return err; 5822ab9cd1cSSteven Whitehouse } 5832ab9cd1cSSteven Whitehouse 5842ab9cd1cSSteven Whitehouse /** 585f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 586f2741d98SSteven Whitehouse * @dir: The parent directory 587f2741d98SSteven Whitehouse * @dentry: The new dentry 5886d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 589f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 590f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 591f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 592f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 5932ab9cd1cSSteven Whitehouse * 594f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 5952ab9cd1cSSteven Whitehouse */ 5962ab9cd1cSSteven Whitehouse 597f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 5986d4ade98SSteven Whitehouse struct file *file, 599175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 600b452a458SAl Viro unsigned int size, int excl) 6012ab9cd1cSSteven Whitehouse { 602f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 603e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 604f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 6052ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 6068e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 6072ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 608a4923865SBob Peterson struct gfs2_glock *io_gl = NULL; 609783013c0SBob Peterson int error, free_vfs_inode = 1; 6109dbe9610SSteven Whitehouse u32 aflags = 0; 611b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 61219aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 6132ab9cd1cSSteven Whitehouse 6142ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 615f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6162ab9cd1cSSteven Whitehouse 6172fba46a0SBob Peterson error = gfs2_qa_get(dip); 6180a305e49SBob Peterson if (error) 6190a305e49SBob Peterson return error; 6200a305e49SBob Peterson 621fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 622fd4b4e04SSteven Whitehouse if (error) 6232fba46a0SBob Peterson goto fail; 624fd4b4e04SSteven Whitehouse 625f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 6262ab9cd1cSSteven Whitehouse if (error) 6272ab9cd1cSSteven Whitehouse goto fail; 628e0b62e21SAndreas Gruenbacher gfs2_holder_mark_uninitialized(ghs + 1); 6292ab9cd1cSSteven Whitehouse 6302ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6312ab9cd1cSSteven Whitehouse if (error) 6322ab9cd1cSSteven Whitehouse goto fail_gunlock; 6332ab9cd1cSSteven Whitehouse 6345a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6355a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6365a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 637571a4b57SAl Viro if (S_ISDIR(inode->i_mode)) { 638571a4b57SAl Viro iput(inode); 639571a4b57SAl Viro inode = ERR_PTR(-EISDIR); 640571a4b57SAl Viro goto fail_gunlock; 641571a4b57SAl Viro } 64244bb31baSAl Viro d_instantiate(dentry, inode); 6436d4ade98SSteven Whitehouse error = 0; 6440d0d1107SMiklos Szeredi if (file) { 64544bb31baSAl Viro if (S_ISREG(inode->i_mode)) 646be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 64744bb31baSAl Viro else 64844bb31baSAl Viro error = finish_no_open(file, NULL); 6495ca1db41SMiklos Szeredi } 6505a00f3ccSSteven Whitehouse gfs2_glock_dq_uninit(ghs); 6512297ab61SBob Peterson goto fail; 6525a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6535a00f3ccSSteven Whitehouse goto fail_gunlock; 6545a00f3ccSSteven Whitehouse } 6555a00f3ccSSteven Whitehouse 6563c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 657fd4b4e04SSteven Whitehouse if (error < 0) 658fd4b4e04SSteven Whitehouse goto fail_gunlock; 659fd4b4e04SSteven Whitehouse 660c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 661fd4b4e04SSteven Whitehouse error = -ENOMEM; 662fd4b4e04SSteven Whitehouse if (!inode) 663fd4b4e04SSteven Whitehouse goto fail_gunlock; 664fd4b4e04SSteven Whitehouse 665e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 666e01580bfSChristoph Hellwig if (error) 667783013c0SBob Peterson goto fail_gunlock; 668e01580bfSChristoph Hellwig 6698e2e0047SBob Peterson ip = GFS2_I(inode); 6702fba46a0SBob Peterson error = gfs2_qa_get(ip); 671ff7f4cb4SSteven Whitehouse if (error) 672e01580bfSChristoph Hellwig goto fail_free_acls; 673c9aecf73SSteven Whitehouse 674c9aecf73SSteven Whitehouse inode->i_mode = mode; 67579ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 676c9aecf73SSteven Whitehouse inode->i_rdev = dev; 677c9aecf73SSteven Whitehouse inode->i_size = size; 678078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 679c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 68000a158beSAbhi Das check_and_update_goal(dip); 681c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 68228fb3027SSteven Whitehouse ip->i_diskflags = 0; 68328fb3027SSteven Whitehouse ip->i_eattr = 0; 68428fb3027SSteven Whitehouse ip->i_height = 0; 68528fb3027SSteven Whitehouse ip->i_depth = 0; 68628fb3027SSteven Whitehouse ip->i_entries = 0; 687cc963a11SBob Peterson ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 68828fb3027SSteven Whitehouse 68928fb3027SSteven Whitehouse switch(mode & S_IFMT) { 69028fb3027SSteven Whitehouse case S_IFREG: 69128fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 69228fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 69328fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 69428fb3027SSteven Whitehouse gfs2_set_aops(inode); 69528fb3027SSteven Whitehouse break; 69628fb3027SSteven Whitehouse case S_IFDIR: 69728fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 69828fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 69928fb3027SSteven Whitehouse ip->i_entries = 2; 70028fb3027SSteven Whitehouse break; 70128fb3027SSteven Whitehouse } 702acc546fdSAbhi Das 703acc546fdSAbhi Das /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 704acc546fdSAbhi Das if (dip->i_diskflags & GFS2_DIF_SYSTEM) 705acc546fdSAbhi Das ip->i_diskflags |= GFS2_DIF_SYSTEM; 706acc546fdSAbhi Das 70728fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 708c9aecf73SSteven Whitehouse 7092b0143b5SDavid Howells if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 7109dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7119dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7129dbe9610SSteven Whitehouse 713b2c8b3eaSSteven Whitehouse if (default_acl || acl) 714b2c8b3eaSSteven Whitehouse blocks++; 715b2c8b3eaSSteven Whitehouse 716b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 717c9aecf73SSteven Whitehouse if (error) 718c9aecf73SSteven Whitehouse goto fail_free_inode; 719c9aecf73SSteven Whitehouse 720b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 721b2c8b3eaSSteven Whitehouse 722c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 723c9aecf73SSteven Whitehouse if (error) 724c9aecf73SSteven Whitehouse goto fail_free_inode; 72598e5a91aSAndreas Gruenbacher flush_delayed_work(&ip->i_gl->gl_work); 7266f6597baSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 72798e5a91aSAndreas Gruenbacher 728c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 729c9aecf73SSteven Whitehouse if (error) 730c9aecf73SSteven Whitehouse goto fail_free_inode; 731c9aecf73SSteven Whitehouse 732b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 733c9aecf73SSteven Whitehouse if (error) 7342c47c1beSBob Peterson goto fail_free_inode; 7350a305e49SBob Peterson 736b2c8b3eaSSteven Whitehouse if (blocks > 1) { 737b2c8b3eaSSteven Whitehouse ip->i_eattr = ip->i_no_addr + 1; 738b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 739b2c8b3eaSSteven Whitehouse } 74079ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 741fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 742fd4b4e04SSteven Whitehouse 743c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 744c9aecf73SSteven Whitehouse if (error) 7452c47c1beSBob Peterson goto fail_free_inode; 746c9aecf73SSteven Whitehouse 747a4923865SBob Peterson BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); 748a4923865SBob Peterson 749c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 750c9aecf73SSteven Whitehouse if (error) 751c9aecf73SSteven Whitehouse goto fail_gunlock2; 752c9aecf73SSteven Whitehouse 753a0e3cc65SAndreas Gruenbacher gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl); 7546f6597baSAndreas Gruenbacher glock_set_object(ip->i_iopen_gh.gh_gl, ip); 755c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 756c9aecf73SSteven Whitehouse insert_inode_hash(inode); 757c9aecf73SSteven Whitehouse 758783013c0SBob Peterson free_vfs_inode = 0; /* After this point, the inode is no longer 759783013c0SBob Peterson considered free. Any failures need to undo 760783013c0SBob Peterson the gfs2 structures. */ 761e01580bfSChristoph Hellwig if (default_acl) { 7621a39ba99SAl Viro error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 7632ab9cd1cSSteven Whitehouse if (error) 764c9aecf73SSteven Whitehouse goto fail_gunlock3; 7656ff9b09eSAndreas Gruenbacher posix_acl_release(default_acl); 7666ff9b09eSAndreas Gruenbacher default_acl = NULL; 7676ff9b09eSAndreas Gruenbacher } 7686ff9b09eSAndreas Gruenbacher if (acl) { 7696ff9b09eSAndreas Gruenbacher error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 7706ff9b09eSAndreas Gruenbacher if (error) 7716ff9b09eSAndreas Gruenbacher goto fail_gunlock3; 7726ff9b09eSAndreas Gruenbacher posix_acl_release(acl); 7736ff9b09eSAndreas Gruenbacher acl = NULL; 7746ff9b09eSAndreas Gruenbacher } 7752ab9cd1cSSteven Whitehouse 776f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 777f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7782ab9cd1cSSteven Whitehouse if (error) 779c9aecf73SSteven Whitehouse goto fail_gunlock3; 7802ab9cd1cSSteven Whitehouse 7813c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 7822ab9cd1cSSteven Whitehouse if (error) 783c9aecf73SSteven Whitehouse goto fail_gunlock3; 7842ab9cd1cSSteven Whitehouse 78579ba7480SSteven Whitehouse mark_inode_dirty(inode); 7866d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 7872c47c1beSBob Peterson /* After instantiate, errors should result in evict which will destroy 7882c47c1beSBob Peterson * both inode and iopen glocks properly. */ 789c5bf8fefSMiklos Szeredi if (file) { 79073a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 791be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 792c5bf8fefSMiklos Szeredi } 79328fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 7942297ab61SBob Peterson gfs2_qa_put(ip); 79528fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 796a4923865SBob Peterson clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 7972c47c1beSBob Peterson gfs2_glock_put(io_gl); 7982297ab61SBob Peterson gfs2_qa_put(dip); 7996d4ade98SSteven Whitehouse return error; 8002ab9cd1cSSteven Whitehouse 801c9aecf73SSteven Whitehouse fail_gunlock3: 8029c1b2808SBob Peterson glock_clear_object(io_gl, ip); 803783013c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 8042ab9cd1cSSteven Whitehouse fail_gunlock2: 805a4923865SBob Peterson clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); 8062c47c1beSBob Peterson gfs2_glock_put(io_gl); 807c9aecf73SSteven Whitehouse fail_free_inode: 8089c1b2808SBob Peterson if (ip->i_gl) { 8099c1b2808SBob Peterson glock_clear_object(ip->i_gl, ip); 8101a0b00d1SBob Peterson if (free_vfs_inode) /* else evict will do the put for us */ 811c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 8129c1b2808SBob Peterson } 8131595548fSAndreas Gruenbacher gfs2_rs_delete(ip, NULL); 8141595548fSAndreas Gruenbacher gfs2_qa_put(ip); 815e01580bfSChristoph Hellwig fail_free_acls: 816e01580bfSChristoph Hellwig posix_acl_release(default_acl); 817e01580bfSChristoph Hellwig posix_acl_release(acl); 8182ab9cd1cSSteven Whitehouse fail_gunlock: 8192b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 820f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 82115a798f7SKefeng Wang if (!IS_ERR_OR_NULL(inode)) { 82279ba7480SSteven Whitehouse clear_nlink(inode); 82305978803SAbhi Das if (!free_vfs_inode) 82479ba7480SSteven Whitehouse mark_inode_dirty(inode); 82505978803SAbhi Das set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 82605978803SAbhi Das &GFS2_I(inode)->i_flags); 82740ac218fSSteven Whitehouse iput(inode); 82840ac218fSSteven Whitehouse } 829e0b62e21SAndreas Gruenbacher if (gfs2_holder_initialized(ghs + 1)) 830e0b62e21SAndreas Gruenbacher gfs2_glock_dq_uninit(ghs + 1); 8312ab9cd1cSSteven Whitehouse fail: 8322fba46a0SBob Peterson gfs2_qa_put(dip); 833f2741d98SSteven Whitehouse return error; 8342ab9cd1cSSteven Whitehouse } 835f2741d98SSteven Whitehouse 8362ab9cd1cSSteven Whitehouse /** 8372ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 8382ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8392ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8402ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 8412ab9cd1cSSteven Whitehouse * 8422ab9cd1cSSteven Whitehouse * Returns: errno 8432ab9cd1cSSteven Whitehouse */ 8442ab9cd1cSSteven Whitehouse 8452ab9cd1cSSteven Whitehouse static int gfs2_create(struct inode *dir, struct dentry *dentry, 846ebfc3b49SAl Viro umode_t mode, bool excl) 8472ab9cd1cSSteven Whitehouse { 848b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 8492ab9cd1cSSteven Whitehouse } 8502ab9cd1cSSteven Whitehouse 8512ab9cd1cSSteven Whitehouse /** 8526d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8532ab9cd1cSSteven Whitehouse * @dir: The directory inode 8542ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8556d4ade98SSteven Whitehouse * @file: File to be opened 8562ab9cd1cSSteven Whitehouse * 8572ab9cd1cSSteven Whitehouse * 8582ab9cd1cSSteven Whitehouse * Returns: errno 8592ab9cd1cSSteven Whitehouse */ 8602ab9cd1cSSteven Whitehouse 8616d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 862b452a458SAl Viro struct file *file) 8632ab9cd1cSSteven Whitehouse { 8646d4ade98SSteven Whitehouse struct inode *inode; 8656d4ade98SSteven Whitehouse struct dentry *d; 8662ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8676d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8682ab9cd1cSSteven Whitehouse int error; 8696d4ade98SSteven Whitehouse 8706d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8717b7a9115SBenjamin Coddington if (inode == NULL) { 8727b7a9115SBenjamin Coddington d_add(dentry, NULL); 8736d4ade98SSteven Whitehouse return NULL; 8747b7a9115SBenjamin Coddington } 8756d4ade98SSteven Whitehouse if (IS_ERR(inode)) 8766d4ade98SSteven Whitehouse return ERR_CAST(inode); 8776d4ade98SSteven Whitehouse 8786d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 8792ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8802ab9cd1cSSteven Whitehouse if (error) { 8812ab9cd1cSSteven Whitehouse iput(inode); 8822ab9cd1cSSteven Whitehouse return ERR_PTR(error); 8832ab9cd1cSSteven Whitehouse } 8846d4ade98SSteven Whitehouse 8856d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 886d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 887d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 888d57b9c9aSJ. Bruce Fields return d; 889d57b9c9aSJ. Bruce Fields } 8906d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 891be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 8926d4ade98SSteven Whitehouse 8932ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 8945ca1db41SMiklos Szeredi if (error) { 8955ca1db41SMiklos Szeredi dput(d); 8966d4ade98SSteven Whitehouse return ERR_PTR(error); 8975ca1db41SMiklos Szeredi } 8986d4ade98SSteven Whitehouse return d; 8992ab9cd1cSSteven Whitehouse } 9006d4ade98SSteven Whitehouse 9016d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 9026d4ade98SSteven Whitehouse unsigned flags) 9036d4ade98SSteven Whitehouse { 904b452a458SAl Viro return __gfs2_lookup(dir, dentry, NULL); 9052ab9cd1cSSteven Whitehouse } 9062ab9cd1cSSteven Whitehouse 9072ab9cd1cSSteven Whitehouse /** 9082ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 9092ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 9102ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 9112ab9cd1cSSteven Whitehouse * @dentry: The name of the link 9122ab9cd1cSSteven Whitehouse * 9132ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 9142ab9cd1cSSteven Whitehouse * name in "dentry". 9152ab9cd1cSSteven Whitehouse * 9162ab9cd1cSSteven Whitehouse * Returns: errno 9172ab9cd1cSSteven Whitehouse */ 9182ab9cd1cSSteven Whitehouse 9192ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 9202ab9cd1cSSteven Whitehouse struct dentry *dentry) 9212ab9cd1cSSteven Whitehouse { 9222ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9232ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9242b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 9252ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9262ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 9272ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 92819aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 9292ab9cd1cSSteven Whitehouse int error; 9302ab9cd1cSSteven Whitehouse 9312ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9322ab9cd1cSSteven Whitehouse return -EPERM; 9332ab9cd1cSSteven Whitehouse 9342fba46a0SBob Peterson error = gfs2_qa_get(dip); 9350a305e49SBob Peterson if (error) 9360a305e49SBob Peterson return error; 9370a305e49SBob Peterson 9382ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 9392ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 9402ab9cd1cSSteven Whitehouse 9412ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 9422ab9cd1cSSteven Whitehouse if (error) 9432ab9cd1cSSteven Whitehouse goto out_parent; 9442ab9cd1cSSteven Whitehouse 9452ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 9462ab9cd1cSSteven Whitehouse if (error) 9472ab9cd1cSSteven Whitehouse goto out_child; 9482ab9cd1cSSteven Whitehouse 9492ab9cd1cSSteven Whitehouse error = -ENOENT; 9502ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9512ab9cd1cSSteven Whitehouse goto out_gunlock; 9522ab9cd1cSSteven Whitehouse 95310556cb2SAl Viro error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 9542ab9cd1cSSteven Whitehouse if (error) 9552ab9cd1cSSteven Whitehouse goto out_gunlock; 9562ab9cd1cSSteven Whitehouse 9572ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9582ab9cd1cSSteven Whitehouse switch (error) { 9592ab9cd1cSSteven Whitehouse case -ENOENT: 9602ab9cd1cSSteven Whitehouse break; 9612ab9cd1cSSteven Whitehouse case 0: 9622ab9cd1cSSteven Whitehouse error = -EEXIST; 9632ab9cd1cSSteven Whitehouse default: 9642ab9cd1cSSteven Whitehouse goto out_gunlock; 9652ab9cd1cSSteven Whitehouse } 9662ab9cd1cSSteven Whitehouse 9672ab9cd1cSSteven Whitehouse error = -EINVAL; 9682ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9692ab9cd1cSSteven Whitehouse goto out_gunlock; 9702ab9cd1cSSteven Whitehouse error = -EFBIG; 9712ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9722ab9cd1cSSteven Whitehouse goto out_gunlock; 9732ab9cd1cSSteven Whitehouse error = -EPERM; 9742ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 9752ab9cd1cSSteven Whitehouse goto out_gunlock; 9762ab9cd1cSSteven Whitehouse error = -EINVAL; 9772ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 9782ab9cd1cSSteven Whitehouse goto out_gunlock; 9792ab9cd1cSSteven Whitehouse error = -EMLINK; 9802ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 9812ab9cd1cSSteven Whitehouse goto out_gunlock; 9822ab9cd1cSSteven Whitehouse 9833c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 9842ab9cd1cSSteven Whitehouse if (error < 0) 9852ab9cd1cSSteven Whitehouse goto out_gunlock; 9862ab9cd1cSSteven Whitehouse 9873c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 9883c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 989b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 9902ab9cd1cSSteven Whitehouse if (error) 9915407e242SBob Peterson goto out_gunlock; 9922ab9cd1cSSteven Whitehouse 9937b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 9942ab9cd1cSSteven Whitehouse if (error) 9952ab9cd1cSSteven Whitehouse goto out_gunlock_q; 9962ab9cd1cSSteven Whitehouse 997534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 9982ab9cd1cSSteven Whitehouse if (error) 9992ab9cd1cSSteven Whitehouse goto out_ipres; 10002ab9cd1cSSteven Whitehouse } else { 10012ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 10022ab9cd1cSSteven Whitehouse if (error) 10032ab9cd1cSSteven Whitehouse goto out_ipres; 10042ab9cd1cSSteven Whitehouse } 10052ab9cd1cSSteven Whitehouse 10062ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 10072ab9cd1cSSteven Whitehouse if (error) 10082ab9cd1cSSteven Whitehouse goto out_end_trans; 10092ab9cd1cSSteven Whitehouse 10102b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 10112ab9cd1cSSteven Whitehouse if (error) 10122ab9cd1cSSteven Whitehouse goto out_brelse; 10132ab9cd1cSSteven Whitehouse 1014350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 10152ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 1016078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 1017ab9bbda0SSteven Whitehouse ihold(inode); 1018ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 1019ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 10202ab9cd1cSSteven Whitehouse 10212ab9cd1cSSteven Whitehouse out_brelse: 10222ab9cd1cSSteven Whitehouse brelse(dibh); 10232ab9cd1cSSteven Whitehouse out_end_trans: 10242ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10252ab9cd1cSSteven Whitehouse out_ipres: 10263c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10272ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10282ab9cd1cSSteven Whitehouse out_gunlock_q: 10293c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10302ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10312ab9cd1cSSteven Whitehouse out_gunlock: 10322b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 10332ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10342ab9cd1cSSteven Whitehouse out_child: 10352ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10362ab9cd1cSSteven Whitehouse out_parent: 10372297ab61SBob Peterson gfs2_qa_put(dip); 10382ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10392ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10402ab9cd1cSSteven Whitehouse return error; 10412ab9cd1cSSteven Whitehouse } 10422ab9cd1cSSteven Whitehouse 10432ab9cd1cSSteven Whitehouse /* 10442ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10452ab9cd1cSSteven Whitehouse * @dip: the directory 10462ab9cd1cSSteven Whitehouse * @name: the name of the file 10472ab9cd1cSSteven Whitehouse * @ip: the inode 10482ab9cd1cSSteven Whitehouse * 10492ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10502ab9cd1cSSteven Whitehouse * 10512ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10522ab9cd1cSSteven Whitehouse */ 10532ab9cd1cSSteven Whitehouse 10542ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10552ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10562ab9cd1cSSteven Whitehouse { 10572ab9cd1cSSteven Whitehouse int error; 10582ab9cd1cSSteven Whitehouse 10592ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10602ab9cd1cSSteven Whitehouse return -EPERM; 10612ab9cd1cSSteven Whitehouse 10622ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10636b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10646b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10652ab9cd1cSSteven Whitehouse return -EPERM; 10662ab9cd1cSSteven Whitehouse 10672ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10682ab9cd1cSSteven Whitehouse return -EPERM; 10692ab9cd1cSSteven Whitehouse 107010556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 10712ab9cd1cSSteven Whitehouse if (error) 10722ab9cd1cSSteven Whitehouse return error; 10732ab9cd1cSSteven Whitehouse 107437975f15SFabian Frederick return gfs2_dir_check(&dip->i_inode, name, ip); 10752ab9cd1cSSteven Whitehouse } 10762ab9cd1cSSteven Whitehouse 10772ab9cd1cSSteven Whitehouse /** 10782ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10792ab9cd1cSSteven Whitehouse * @dip: The parent directory 10802ab9cd1cSSteven Whitehouse * @name: The name of the entry in the parent directory 10812ab9cd1cSSteven Whitehouse * @inode: The inode to be removed 10822ab9cd1cSSteven Whitehouse * 10832ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 10842ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 10852ab9cd1cSSteven Whitehouse * 10862ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10872ab9cd1cSSteven Whitehouse */ 10882ab9cd1cSSteven Whitehouse 10892ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 10904327a9bfSBob Peterson const struct dentry *dentry) 10912ab9cd1cSSteven Whitehouse { 10922b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 10932ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10942ab9cd1cSSteven Whitehouse int error; 10952ab9cd1cSSteven Whitehouse 10962ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 10972ab9cd1cSSteven Whitehouse if (error) 10982ab9cd1cSSteven Whitehouse return error; 10992ab9cd1cSSteven Whitehouse 11002ab9cd1cSSteven Whitehouse ip->i_entries = 0; 1101078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 11022ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 11032ab9cd1cSSteven Whitehouse clear_nlink(inode); 11042ab9cd1cSSteven Whitehouse else 11052ab9cd1cSSteven Whitehouse drop_nlink(inode); 11062ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 11072ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11082ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 11092ab9cd1cSSteven Whitehouse return 0; 11102ab9cd1cSSteven Whitehouse } 11112ab9cd1cSSteven Whitehouse 11122ab9cd1cSSteven Whitehouse 11132ab9cd1cSSteven Whitehouse /** 11142ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 11152ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 11162ab9cd1cSSteven Whitehouse * @dentry: The file itself 11172ab9cd1cSSteven Whitehouse * 11182ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 11192ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 11202ab9cd1cSSteven Whitehouse * 11212ab9cd1cSSteven Whitehouse * Returns: errno 11222ab9cd1cSSteven Whitehouse */ 11232ab9cd1cSSteven Whitehouse 11242ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11252ab9cd1cSSteven Whitehouse { 11262ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11272ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11282b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11292ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11302ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 11312ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11325e2f7d61SBob Peterson int error; 11335e2f7d61SBob Peterson 11345e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11355e2f7d61SBob Peterson if (error) 11365e2f7d61SBob Peterson return error; 11375e2f7d61SBob Peterson 11385e2f7d61SBob Peterson error = -EROFS; 11392ab9cd1cSSteven Whitehouse 11402ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 11412ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 11422ab9cd1cSSteven Whitehouse 114366fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1144a365fbf3SSteven Whitehouse if (!rgd) 114587654896SSteven Whitehouse goto out_inodes; 1146a365fbf3SSteven Whitehouse 11472ab9cd1cSSteven Whitehouse gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 11482ab9cd1cSSteven Whitehouse 11492ab9cd1cSSteven Whitehouse 11502ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 11512ab9cd1cSSteven Whitehouse if (error) 11522ab9cd1cSSteven Whitehouse goto out_parent; 11532ab9cd1cSSteven Whitehouse 11542ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 11552ab9cd1cSSteven Whitehouse if (error) 11562ab9cd1cSSteven Whitehouse goto out_child; 11572ab9cd1cSSteven Whitehouse 11582ab9cd1cSSteven Whitehouse error = -ENOENT; 11592ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11602ab9cd1cSSteven Whitehouse goto out_rgrp; 11612ab9cd1cSSteven Whitehouse 11622ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11632ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11642ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11652ab9cd1cSSteven Whitehouse goto out_rgrp; 11662ab9cd1cSSteven Whitehouse } 11672ab9cd1cSSteven Whitehouse 11682ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 11692ab9cd1cSSteven Whitehouse if (error) 11702ab9cd1cSSteven Whitehouse goto out_rgrp; 11712ab9cd1cSSteven Whitehouse 11722ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11732ab9cd1cSSteven Whitehouse if (error) 11742ab9cd1cSSteven Whitehouse goto out_gunlock; 11752ab9cd1cSSteven Whitehouse 11762ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 11772ab9cd1cSSteven Whitehouse if (error) 11782eb5909dSBob Peterson goto out_gunlock; 11792ab9cd1cSSteven Whitehouse 11804327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 11812ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11822eb5909dSBob Peterson 11832ab9cd1cSSteven Whitehouse out_gunlock: 11842ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11852ab9cd1cSSteven Whitehouse out_rgrp: 11862ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11872ab9cd1cSSteven Whitehouse out_child: 11882ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 11892ab9cd1cSSteven Whitehouse out_parent: 119087654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 119187654896SSteven Whitehouse out_inodes: 119287654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 11932ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 11942ab9cd1cSSteven Whitehouse return error; 11952ab9cd1cSSteven Whitehouse } 11962ab9cd1cSSteven Whitehouse 11972ab9cd1cSSteven Whitehouse /** 11982ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 11992ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 12002ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 12012ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 12022ab9cd1cSSteven Whitehouse * 12032ab9cd1cSSteven Whitehouse * Returns: errno 12042ab9cd1cSSteven Whitehouse */ 12052ab9cd1cSSteven Whitehouse 12062ab9cd1cSSteven Whitehouse static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 12072ab9cd1cSSteven Whitehouse const char *symname) 12082ab9cd1cSSteven Whitehouse { 1209160b4026SSteven Whitehouse unsigned int size; 12102ab9cd1cSSteven Whitehouse 12112ab9cd1cSSteven Whitehouse size = strlen(symname); 1212235628c5SAndreas Gruenbacher if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 12132ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 12142ab9cd1cSSteven Whitehouse 1215b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 12162ab9cd1cSSteven Whitehouse } 12172ab9cd1cSSteven Whitehouse 12182ab9cd1cSSteven Whitehouse /** 12192ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 12202ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12212ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12222ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12232ab9cd1cSSteven Whitehouse * 12242ab9cd1cSSteven Whitehouse * Returns: errno 12252ab9cd1cSSteven Whitehouse */ 12262ab9cd1cSSteven Whitehouse 122718bb1db3SAl Viro static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 12282ab9cd1cSSteven Whitehouse { 1229235628c5SAndreas Gruenbacher unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1230b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 12312ab9cd1cSSteven Whitehouse } 12322ab9cd1cSSteven Whitehouse 12332ab9cd1cSSteven Whitehouse /** 12342ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 12352ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12362ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12372ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1238f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12392ab9cd1cSSteven Whitehouse * 12402ab9cd1cSSteven Whitehouse */ 12412ab9cd1cSSteven Whitehouse 12421a67aafbSAl Viro static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 12432ab9cd1cSSteven Whitehouse dev_t dev) 12442ab9cd1cSSteven Whitehouse { 1245b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 12466d4ade98SSteven Whitehouse } 12476d4ade98SSteven Whitehouse 12486d4ade98SSteven Whitehouse /** 12496d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12506d4ade98SSteven Whitehouse * @dir: The directory 12516d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12526d4ade98SSteven Whitehouse * @file: The proposed new struct file 12536d4ade98SSteven Whitehouse * @flags: open flags 12546d4ade98SSteven Whitehouse * @mode: File mode 12556d4ade98SSteven Whitehouse * 12566d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12576d4ade98SSteven Whitehouse */ 12586d4ade98SSteven Whitehouse 12596d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12606d4ade98SSteven Whitehouse struct file *file, unsigned flags, 126144907d79SAl Viro umode_t mode) 12626d4ade98SSteven Whitehouse { 12636d4ade98SSteven Whitehouse struct dentry *d; 12646d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12656d4ade98SSteven Whitehouse 126600699ad8SAl Viro if (!d_in_lookup(dentry)) 12674d93bc3eSAl Viro goto skip_lookup; 12684d93bc3eSAl Viro 1269b452a458SAl Viro d = __gfs2_lookup(dir, dentry, file); 12706d4ade98SSteven Whitehouse if (IS_ERR(d)) 12716d4ade98SSteven Whitehouse return PTR_ERR(d); 12725ca1db41SMiklos Szeredi if (d != NULL) 12735ca1db41SMiklos Szeredi dentry = d; 12742b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1275aad888f8SAl Viro if (!(file->f_mode & FMODE_OPENED)) 1276ec7d879cSAl Viro return finish_no_open(file, d); 12775ca1db41SMiklos Szeredi dput(d); 127821039132SAl Viro return excl && (flags & O_CREAT) ? -EEXIST : 0; 12796d4ade98SSteven Whitehouse } 12806d4ade98SSteven Whitehouse 12815ca1db41SMiklos Szeredi BUG_ON(d != NULL); 12824d93bc3eSAl Viro 12834d93bc3eSAl Viro skip_lookup: 12846d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 12856d4ade98SSteven Whitehouse return -ENOENT; 12866d4ade98SSteven Whitehouse 1287b452a458SAl Viro return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 12882ab9cd1cSSteven Whitehouse } 12892ab9cd1cSSteven Whitehouse 12902ab9cd1cSSteven Whitehouse /* 12912ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 12922ab9cd1cSSteven Whitehouse * @this: move this 12932ab9cd1cSSteven Whitehouse * @to: to here 12942ab9cd1cSSteven Whitehouse * 12952ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 12962ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 12972ab9cd1cSSteven Whitehouse * 12982ab9cd1cSSteven Whitehouse * Returns: errno 12992ab9cd1cSSteven Whitehouse */ 13002ab9cd1cSSteven Whitehouse 13012ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 13022ab9cd1cSSteven Whitehouse { 13032ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 13042ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 13052ab9cd1cSSteven Whitehouse struct inode *tmp; 13062ab9cd1cSSteven Whitehouse int error = 0; 13072ab9cd1cSSteven Whitehouse 13082ab9cd1cSSteven Whitehouse igrab(dir); 13092ab9cd1cSSteven Whitehouse 13102ab9cd1cSSteven Whitehouse for (;;) { 13112ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 13122ab9cd1cSSteven Whitehouse error = -EINVAL; 13132ab9cd1cSSteven Whitehouse break; 13142ab9cd1cSSteven Whitehouse } 13152b0143b5SDavid Howells if (dir == d_inode(sb->s_root)) { 13162ab9cd1cSSteven Whitehouse error = 0; 13172ab9cd1cSSteven Whitehouse break; 13182ab9cd1cSSteven Whitehouse } 13192ab9cd1cSSteven Whitehouse 13202ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 132148f8f711SAbhi Das if (!tmp) { 132248f8f711SAbhi Das error = -ENOENT; 132348f8f711SAbhi Das break; 132448f8f711SAbhi Das } 13252ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13262ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13272ab9cd1cSSteven Whitehouse break; 13282ab9cd1cSSteven Whitehouse } 13292ab9cd1cSSteven Whitehouse 13302ab9cd1cSSteven Whitehouse iput(dir); 13312ab9cd1cSSteven Whitehouse dir = tmp; 13322ab9cd1cSSteven Whitehouse } 13332ab9cd1cSSteven Whitehouse 13342ab9cd1cSSteven Whitehouse iput(dir); 13352ab9cd1cSSteven Whitehouse 13362ab9cd1cSSteven Whitehouse return error; 13372ab9cd1cSSteven Whitehouse } 13382ab9cd1cSSteven Whitehouse 13392ab9cd1cSSteven Whitehouse /** 1340a63b7bbcSBenjamin Marzinski * update_moved_ino - Update an inode that's being moved 1341a63b7bbcSBenjamin Marzinski * @ip: The inode being moved 1342a63b7bbcSBenjamin Marzinski * @ndip: The parent directory of the new filename 1343a63b7bbcSBenjamin Marzinski * @dir_rename: True of ip is a directory 1344a63b7bbcSBenjamin Marzinski * 1345a63b7bbcSBenjamin Marzinski * Returns: errno 1346a63b7bbcSBenjamin Marzinski */ 1347a63b7bbcSBenjamin Marzinski 1348a63b7bbcSBenjamin Marzinski static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1349a63b7bbcSBenjamin Marzinski int dir_rename) 1350a63b7bbcSBenjamin Marzinski { 1351a63b7bbcSBenjamin Marzinski if (dir_rename) 1352a63b7bbcSBenjamin Marzinski return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1353a63b7bbcSBenjamin Marzinski 1354078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 135583998ccdSAndreas Gruenbacher mark_inode_dirty_sync(&ip->i_inode); 1356a63b7bbcSBenjamin Marzinski return 0; 1357a63b7bbcSBenjamin Marzinski } 1358a63b7bbcSBenjamin Marzinski 1359a63b7bbcSBenjamin Marzinski 1360a63b7bbcSBenjamin Marzinski /** 13612ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13622ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13632ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13642ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13652ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13662ab9cd1cSSteven Whitehouse * 13672ab9cd1cSSteven Whitehouse * Returns: errno 13682ab9cd1cSSteven Whitehouse */ 13692ab9cd1cSSteven Whitehouse 13702ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13712ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13722ab9cd1cSSteven Whitehouse { 13732ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 13742ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 13752b0143b5SDavid Howells struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 13762ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 13772ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 1378bc74aaefSBob Peterson struct gfs2_holder ghs[4], r_gh, rd_gh; 13792ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 13802ab9cd1cSSteven Whitehouse unsigned int num_gh; 13812ab9cd1cSSteven Whitehouse int dir_rename = 0; 138219aeb5a6SBob Peterson struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 13832ab9cd1cSSteven Whitehouse unsigned int x; 13842ab9cd1cSSteven Whitehouse int error; 13852ab9cd1cSSteven Whitehouse 13866df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1387bc74aaefSBob Peterson gfs2_holder_mark_uninitialized(&rd_gh); 13882b0143b5SDavid Howells if (d_really_is_positive(ndentry)) { 13892b0143b5SDavid Howells nip = GFS2_I(d_inode(ndentry)); 13902ab9cd1cSSteven Whitehouse if (ip == nip) 13912ab9cd1cSSteven Whitehouse return 0; 13922ab9cd1cSSteven Whitehouse } 13932ab9cd1cSSteven Whitehouse 13945e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 13955e2f7d61SBob Peterson if (error) 13965e2f7d61SBob Peterson return error; 13975e2f7d61SBob Peterson 13982fba46a0SBob Peterson error = gfs2_qa_get(ndip); 13990a305e49SBob Peterson if (error) 14000a305e49SBob Peterson return error; 14010a305e49SBob Peterson 14022ab9cd1cSSteven Whitehouse if (odip != ndip) { 14032ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 14042ab9cd1cSSteven Whitehouse 0, &r_gh); 14052ab9cd1cSSteven Whitehouse if (error) 14062ab9cd1cSSteven Whitehouse goto out; 14072ab9cd1cSSteven Whitehouse 14082ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 14092ab9cd1cSSteven Whitehouse dir_rename = 1; 1410a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 14112ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 14122ab9cd1cSSteven Whitehouse if (error) 14132ab9cd1cSSteven Whitehouse goto out_gunlock_r; 14142ab9cd1cSSteven Whitehouse } 14152ab9cd1cSSteven Whitehouse } 14162ab9cd1cSSteven Whitehouse 14172ab9cd1cSSteven Whitehouse num_gh = 1; 1418ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 14192ab9cd1cSSteven Whitehouse if (odip != ndip) { 1420ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1421ad26967bSBob Peterson ghs + num_gh); 14222ab9cd1cSSteven Whitehouse num_gh++; 14232ab9cd1cSSteven Whitehouse } 1424ad26967bSBob Peterson gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 14252ab9cd1cSSteven Whitehouse num_gh++; 14262ab9cd1cSSteven Whitehouse 14272ab9cd1cSSteven Whitehouse if (nip) { 1428ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1429ad26967bSBob Peterson ghs + num_gh); 14302ab9cd1cSSteven Whitehouse num_gh++; 14312ab9cd1cSSteven Whitehouse } 14322ab9cd1cSSteven Whitehouse 14332ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 14342ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 14352ab9cd1cSSteven Whitehouse if (error) 14362ab9cd1cSSteven Whitehouse goto out_gunlock; 14372ab9cd1cSSteven Whitehouse } 1438ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1439ad26967bSBob Peterson if (error) 1440ad26967bSBob Peterson goto out_gunlock; 14412ab9cd1cSSteven Whitehouse 1442bc74aaefSBob Peterson if (nip) { 1443bc74aaefSBob Peterson /* Grab the resource group glock for unlink flag twiddling. 1444bc74aaefSBob Peterson * This is the case where the target dinode already exists 1445bc74aaefSBob Peterson * so we unlink before doing the rename. 1446bc74aaefSBob Peterson */ 1447bc74aaefSBob Peterson nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1448bc74aaefSBob Peterson if (!nrgd) { 1449bc74aaefSBob Peterson error = -ENOENT; 1450bc74aaefSBob Peterson goto out_gunlock; 1451bc74aaefSBob Peterson } 1452bc74aaefSBob Peterson error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, 1453bc74aaefSBob Peterson &rd_gh); 1454bc74aaefSBob Peterson if (error) 1455bc74aaefSBob Peterson goto out_gunlock; 1456bc74aaefSBob Peterson } 1457bc74aaefSBob Peterson 14582ab9cd1cSSteven Whitehouse error = -ENOENT; 14592ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14602ab9cd1cSSteven Whitehouse goto out_gunlock; 14612ab9cd1cSSteven Whitehouse 14622ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14632ab9cd1cSSteven Whitehouse 14642ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14652ab9cd1cSSteven Whitehouse if (error) 14662ab9cd1cSSteven Whitehouse goto out_gunlock; 14672ab9cd1cSSteven Whitehouse 14682ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14692ab9cd1cSSteven Whitehouse 14702ab9cd1cSSteven Whitehouse if (nip) { 14712ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14722ab9cd1cSSteven Whitehouse if (error) 14732ab9cd1cSSteven Whitehouse goto out_gunlock; 14742ab9cd1cSSteven Whitehouse 14752ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 14762ab9cd1cSSteven Whitehouse error = -EAGAIN; 14772ab9cd1cSSteven Whitehouse goto out_gunlock; 14782ab9cd1cSSteven Whitehouse } 14792ab9cd1cSSteven Whitehouse 14802ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 14812ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 14822ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 14832ab9cd1cSSteven Whitehouse error = -EIO; 14842ab9cd1cSSteven Whitehouse goto out_gunlock; 14852ab9cd1cSSteven Whitehouse } 14862ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 14872ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 14882ab9cd1cSSteven Whitehouse goto out_gunlock; 14892ab9cd1cSSteven Whitehouse } 14902ab9cd1cSSteven Whitehouse } 14912ab9cd1cSSteven Whitehouse } else { 149210556cb2SAl Viro error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 14932ab9cd1cSSteven Whitehouse if (error) 14942ab9cd1cSSteven Whitehouse goto out_gunlock; 14952ab9cd1cSSteven Whitehouse 14962ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 14972ab9cd1cSSteven Whitehouse switch (error) { 14982ab9cd1cSSteven Whitehouse case -ENOENT: 14992ab9cd1cSSteven Whitehouse error = 0; 15002ab9cd1cSSteven Whitehouse break; 15012ab9cd1cSSteven Whitehouse case 0: 15022ab9cd1cSSteven Whitehouse error = -EEXIST; 15032ab9cd1cSSteven Whitehouse default: 15042ab9cd1cSSteven Whitehouse goto out_gunlock; 1505098b9c14SAliasgar Surti } 15062ab9cd1cSSteven Whitehouse 15072ab9cd1cSSteven Whitehouse if (odip != ndip) { 15082ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 15092ab9cd1cSSteven Whitehouse error = -ENOENT; 15102ab9cd1cSSteven Whitehouse goto out_gunlock; 15112ab9cd1cSSteven Whitehouse } 15122ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 15132ab9cd1cSSteven Whitehouse error = -EFBIG; 15142ab9cd1cSSteven Whitehouse goto out_gunlock; 15152ab9cd1cSSteven Whitehouse } 15162ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 15172ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 15182ab9cd1cSSteven Whitehouse error = -EMLINK; 15192ab9cd1cSSteven Whitehouse goto out_gunlock; 15202ab9cd1cSSteven Whitehouse } 15212ab9cd1cSSteven Whitehouse } 15222ab9cd1cSSteven Whitehouse } 15232ab9cd1cSSteven Whitehouse 15242ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 15252ab9cd1cSSteven Whitehouse 15262ab9cd1cSSteven Whitehouse if (dir_rename) { 15272b0143b5SDavid Howells error = gfs2_permission(d_inode(odentry), MAY_WRITE); 15282ab9cd1cSSteven Whitehouse if (error) 15292ab9cd1cSSteven Whitehouse goto out_gunlock; 15302ab9cd1cSSteven Whitehouse } 15312ab9cd1cSSteven Whitehouse 15323c1c0ae1SSteven Whitehouse if (nip == NULL) { 15333c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 15343c1c0ae1SSteven Whitehouse if (error) 15352ab9cd1cSSteven Whitehouse goto out_gunlock; 15363c1c0ae1SSteven Whitehouse } 15372ab9cd1cSSteven Whitehouse 15383c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 15393c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1540b8fbf471SAbhi Das error = gfs2_quota_lock_check(ndip, &ap); 15412ab9cd1cSSteven Whitehouse if (error) 15425407e242SBob Peterson goto out_gunlock; 15432ab9cd1cSSteven Whitehouse 15447b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 15452ab9cd1cSSteven Whitehouse if (error) 15462ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15472ab9cd1cSSteven Whitehouse 1548534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1549534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 15502ab9cd1cSSteven Whitehouse if (error) 15512ab9cd1cSSteven Whitehouse goto out_ipreserv; 15522ab9cd1cSSteven Whitehouse } else { 15532ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 15542ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 15552ab9cd1cSSteven Whitehouse if (error) 15562ab9cd1cSSteven Whitehouse goto out_gunlock; 15572ab9cd1cSSteven Whitehouse } 15582ab9cd1cSSteven Whitehouse 15592ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15602ab9cd1cSSteven Whitehouse 15614327a9bfSBob Peterson if (nip) 15624327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15632ab9cd1cSSteven Whitehouse 1564a63b7bbcSBenjamin Marzinski error = update_moved_ino(ip, ndip, dir_rename); 15652ab9cd1cSSteven Whitehouse if (error) 15662ab9cd1cSSteven Whitehouse goto out_end_trans; 15672ab9cd1cSSteven Whitehouse 15682ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15692ab9cd1cSSteven Whitehouse if (error) 15702ab9cd1cSSteven Whitehouse goto out_end_trans; 15712ab9cd1cSSteven Whitehouse 15722b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 15732ab9cd1cSSteven Whitehouse if (error) 15742ab9cd1cSSteven Whitehouse goto out_end_trans; 15752ab9cd1cSSteven Whitehouse 15762ab9cd1cSSteven Whitehouse out_end_trans: 15772ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 15782ab9cd1cSSteven Whitehouse out_ipreserv: 15793c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15802ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 15812ab9cd1cSSteven Whitehouse out_gunlock_q: 15823c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15832ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 15842ab9cd1cSSteven Whitehouse out_gunlock: 15852b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1586bc74aaefSBob Peterson if (gfs2_holder_initialized(&rd_gh)) 1587bc74aaefSBob Peterson gfs2_glock_dq_uninit(&rd_gh); 1588bc74aaefSBob Peterson 15892ab9cd1cSSteven Whitehouse while (x--) { 1590ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 15912ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 15922ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 15932ab9cd1cSSteven Whitehouse } 15942ab9cd1cSSteven Whitehouse out_gunlock_r: 15956df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 15962ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 15972ab9cd1cSSteven Whitehouse out: 15982fba46a0SBob Peterson gfs2_qa_put(ndip); 15992ab9cd1cSSteven Whitehouse return error; 16002ab9cd1cSSteven Whitehouse } 16012ab9cd1cSSteven Whitehouse 16022ab9cd1cSSteven Whitehouse /** 1603a63b7bbcSBenjamin Marzinski * gfs2_exchange - exchange two files 1604a63b7bbcSBenjamin Marzinski * @odir: Parent directory of old file name 1605a63b7bbcSBenjamin Marzinski * @odentry: The old dentry of the file 1606a63b7bbcSBenjamin Marzinski * @ndir: Parent directory of new file name 1607a63b7bbcSBenjamin Marzinski * @ndentry: The new dentry of the file 1608a63b7bbcSBenjamin Marzinski * @flags: The rename flags 1609a63b7bbcSBenjamin Marzinski * 1610a63b7bbcSBenjamin Marzinski * Returns: errno 1611a63b7bbcSBenjamin Marzinski */ 1612a63b7bbcSBenjamin Marzinski 1613a63b7bbcSBenjamin Marzinski static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1614a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1615a63b7bbcSBenjamin Marzinski unsigned int flags) 1616a63b7bbcSBenjamin Marzinski { 1617a63b7bbcSBenjamin Marzinski struct gfs2_inode *odip = GFS2_I(odir); 1618a63b7bbcSBenjamin Marzinski struct gfs2_inode *ndip = GFS2_I(ndir); 1619a63b7bbcSBenjamin Marzinski struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1620a63b7bbcSBenjamin Marzinski struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1621a63b7bbcSBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(odir); 1622ad26967bSBob Peterson struct gfs2_holder ghs[4], r_gh; 1623a63b7bbcSBenjamin Marzinski unsigned int num_gh; 1624a63b7bbcSBenjamin Marzinski unsigned int x; 1625a63b7bbcSBenjamin Marzinski umode_t old_mode = oip->i_inode.i_mode; 1626a63b7bbcSBenjamin Marzinski umode_t new_mode = nip->i_inode.i_mode; 1627a63b7bbcSBenjamin Marzinski int error; 1628a63b7bbcSBenjamin Marzinski 16296df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1630a63b7bbcSBenjamin Marzinski error = gfs2_rindex_update(sdp); 1631a63b7bbcSBenjamin Marzinski if (error) 1632a63b7bbcSBenjamin Marzinski return error; 1633a63b7bbcSBenjamin Marzinski 1634a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1635a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1636a63b7bbcSBenjamin Marzinski 0, &r_gh); 1637a63b7bbcSBenjamin Marzinski if (error) 1638a63b7bbcSBenjamin Marzinski goto out; 1639a63b7bbcSBenjamin Marzinski 1640a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1641a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1642a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(oip, ndip); 1643a63b7bbcSBenjamin Marzinski if (error) 1644a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1645a63b7bbcSBenjamin Marzinski } 1646a63b7bbcSBenjamin Marzinski 1647a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1648a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1649a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(nip, odip); 1650a63b7bbcSBenjamin Marzinski if (error) 1651a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1652a63b7bbcSBenjamin Marzinski } 1653a63b7bbcSBenjamin Marzinski } 1654a63b7bbcSBenjamin Marzinski 1655a63b7bbcSBenjamin Marzinski num_gh = 1; 1656ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1657a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1658ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1659ad26967bSBob Peterson ghs + num_gh); 1660a63b7bbcSBenjamin Marzinski num_gh++; 1661a63b7bbcSBenjamin Marzinski } 1662ad26967bSBob Peterson gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1663a63b7bbcSBenjamin Marzinski num_gh++; 1664a63b7bbcSBenjamin Marzinski 1665ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1666a63b7bbcSBenjamin Marzinski num_gh++; 1667a63b7bbcSBenjamin Marzinski 1668a63b7bbcSBenjamin Marzinski for (x = 0; x < num_gh; x++) { 1669a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq(ghs + x); 1670a63b7bbcSBenjamin Marzinski if (error) 1671a63b7bbcSBenjamin Marzinski goto out_gunlock; 1672a63b7bbcSBenjamin Marzinski } 1673a63b7bbcSBenjamin Marzinski 1674ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1675ad26967bSBob Peterson if (error) 1676ad26967bSBob Peterson goto out_gunlock; 1677ad26967bSBob Peterson 1678a63b7bbcSBenjamin Marzinski error = -ENOENT; 1679a63b7bbcSBenjamin Marzinski if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1680a63b7bbcSBenjamin Marzinski goto out_gunlock; 1681a63b7bbcSBenjamin Marzinski 1682a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1683a63b7bbcSBenjamin Marzinski if (error) 1684a63b7bbcSBenjamin Marzinski goto out_gunlock; 1685a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1686a63b7bbcSBenjamin Marzinski if (error) 1687a63b7bbcSBenjamin Marzinski goto out_gunlock; 1688a63b7bbcSBenjamin Marzinski 1689a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1690a63b7bbcSBenjamin Marzinski error = gfs2_permission(odentry->d_inode, MAY_WRITE); 1691a63b7bbcSBenjamin Marzinski if (error) 1692a63b7bbcSBenjamin Marzinski goto out_gunlock; 1693a63b7bbcSBenjamin Marzinski } 1694a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1695a63b7bbcSBenjamin Marzinski error = gfs2_permission(ndentry->d_inode, MAY_WRITE); 1696a63b7bbcSBenjamin Marzinski if (error) 1697a63b7bbcSBenjamin Marzinski goto out_gunlock; 1698a63b7bbcSBenjamin Marzinski } 1699a63b7bbcSBenjamin Marzinski error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1700a63b7bbcSBenjamin Marzinski if (error) 1701a63b7bbcSBenjamin Marzinski goto out_gunlock; 1702a63b7bbcSBenjamin Marzinski 1703a63b7bbcSBenjamin Marzinski error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1704a63b7bbcSBenjamin Marzinski if (error) 1705a63b7bbcSBenjamin Marzinski goto out_end_trans; 1706a63b7bbcSBenjamin Marzinski 1707a63b7bbcSBenjamin Marzinski error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1708a63b7bbcSBenjamin Marzinski if (error) 1709a63b7bbcSBenjamin Marzinski goto out_end_trans; 1710a63b7bbcSBenjamin Marzinski 1711a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1712a63b7bbcSBenjamin Marzinski IF2DT(old_mode)); 1713a63b7bbcSBenjamin Marzinski if (error) 1714a63b7bbcSBenjamin Marzinski goto out_end_trans; 1715a63b7bbcSBenjamin Marzinski 1716a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1717a63b7bbcSBenjamin Marzinski IF2DT(new_mode)); 1718a63b7bbcSBenjamin Marzinski if (error) 1719a63b7bbcSBenjamin Marzinski goto out_end_trans; 1720a63b7bbcSBenjamin Marzinski 1721a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1722a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1723a63b7bbcSBenjamin Marzinski inc_nlink(&odip->i_inode); 1724a63b7bbcSBenjamin Marzinski drop_nlink(&ndip->i_inode); 1725a63b7bbcSBenjamin Marzinski } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1726a63b7bbcSBenjamin Marzinski inc_nlink(&ndip->i_inode); 1727a63b7bbcSBenjamin Marzinski drop_nlink(&odip->i_inode); 1728a63b7bbcSBenjamin Marzinski } 1729a63b7bbcSBenjamin Marzinski } 1730a63b7bbcSBenjamin Marzinski mark_inode_dirty(&ndip->i_inode); 1731a63b7bbcSBenjamin Marzinski if (odip != ndip) 1732a63b7bbcSBenjamin Marzinski mark_inode_dirty(&odip->i_inode); 1733a63b7bbcSBenjamin Marzinski 1734a63b7bbcSBenjamin Marzinski out_end_trans: 1735a63b7bbcSBenjamin Marzinski gfs2_trans_end(sdp); 1736a63b7bbcSBenjamin Marzinski out_gunlock: 1737a63b7bbcSBenjamin Marzinski while (x--) { 1738ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 1739a63b7bbcSBenjamin Marzinski gfs2_glock_dq(ghs + x); 1740a63b7bbcSBenjamin Marzinski gfs2_holder_uninit(ghs + x); 1741a63b7bbcSBenjamin Marzinski } 1742a63b7bbcSBenjamin Marzinski out_gunlock_r: 17436df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 1744a63b7bbcSBenjamin Marzinski gfs2_glock_dq_uninit(&r_gh); 1745a63b7bbcSBenjamin Marzinski out: 1746a63b7bbcSBenjamin Marzinski return error; 1747a63b7bbcSBenjamin Marzinski } 1748a63b7bbcSBenjamin Marzinski 1749a63b7bbcSBenjamin Marzinski static int gfs2_rename2(struct inode *odir, struct dentry *odentry, 1750a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1751a63b7bbcSBenjamin Marzinski unsigned int flags) 1752a63b7bbcSBenjamin Marzinski { 1753a63b7bbcSBenjamin Marzinski flags &= ~RENAME_NOREPLACE; 1754a63b7bbcSBenjamin Marzinski 1755a63b7bbcSBenjamin Marzinski if (flags & ~RENAME_EXCHANGE) 1756a63b7bbcSBenjamin Marzinski return -EINVAL; 1757a63b7bbcSBenjamin Marzinski 1758a63b7bbcSBenjamin Marzinski if (flags & RENAME_EXCHANGE) 1759a63b7bbcSBenjamin Marzinski return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1760a63b7bbcSBenjamin Marzinski 1761a63b7bbcSBenjamin Marzinski return gfs2_rename(odir, odentry, ndir, ndentry); 1762a63b7bbcSBenjamin Marzinski } 1763a63b7bbcSBenjamin Marzinski 1764a63b7bbcSBenjamin Marzinski /** 17656b255391SAl Viro * gfs2_get_link - Follow a symbolic link 17662ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 17676b255391SAl Viro * @inode: The inode of the link 1768fceef393SAl Viro * @done: destructor for return value 17692ab9cd1cSSteven Whitehouse * 17702ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 17712ab9cd1cSSteven Whitehouse * 17722ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 17732ab9cd1cSSteven Whitehouse */ 17742ab9cd1cSSteven Whitehouse 17756b255391SAl Viro static const char *gfs2_get_link(struct dentry *dentry, 1776fceef393SAl Viro struct inode *inode, 1777fceef393SAl Viro struct delayed_call *done) 17782ab9cd1cSSteven Whitehouse { 17796b255391SAl Viro struct gfs2_inode *ip = GFS2_I(inode); 17802ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 17812ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1782160b4026SSteven Whitehouse unsigned int size; 17832ab9cd1cSSteven Whitehouse char *buf; 17842ab9cd1cSSteven Whitehouse int error; 17852ab9cd1cSSteven Whitehouse 17866b255391SAl Viro if (!dentry) 17876b255391SAl Viro return ERR_PTR(-ECHILD); 17886b255391SAl Viro 17892ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 17902ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 17912ab9cd1cSSteven Whitehouse if (error) { 17922ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 1793680baacbSAl Viro return ERR_PTR(error); 17942ab9cd1cSSteven Whitehouse } 17952ab9cd1cSSteven Whitehouse 17962ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 17972ab9cd1cSSteven Whitehouse if (size == 0) { 17982ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 17992ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 18002ab9cd1cSSteven Whitehouse goto out; 18012ab9cd1cSSteven Whitehouse } 18022ab9cd1cSSteven Whitehouse 18032ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 18042ab9cd1cSSteven Whitehouse if (error) { 18052ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 18062ab9cd1cSSteven Whitehouse goto out; 18072ab9cd1cSSteven Whitehouse } 18082ab9cd1cSSteven Whitehouse 1809160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 18102ab9cd1cSSteven Whitehouse if (!buf) 18112ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 18122ab9cd1cSSteven Whitehouse else 1813160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 18142ab9cd1cSSteven Whitehouse brelse(dibh); 18152ab9cd1cSSteven Whitehouse out: 18162ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 1817680baacbSAl Viro if (!IS_ERR(buf)) 1818fceef393SAl Viro set_delayed_call(done, kfree_link, buf); 1819680baacbSAl Viro return buf; 18202ab9cd1cSSteven Whitehouse } 18212ab9cd1cSSteven Whitehouse 18222ab9cd1cSSteven Whitehouse /** 18232ab9cd1cSSteven Whitehouse * gfs2_permission - 18242ab9cd1cSSteven Whitehouse * @inode: The inode 18252ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 18262ab9cd1cSSteven Whitehouse * @flags: Indicates whether this is an RCU path walk or not 18272ab9cd1cSSteven Whitehouse * 18282ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18292ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18302ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 18312ab9cd1cSSteven Whitehouse * 18322ab9cd1cSSteven Whitehouse * Returns: errno 18332ab9cd1cSSteven Whitehouse */ 18342ab9cd1cSSteven Whitehouse 183510556cb2SAl Viro int gfs2_permission(struct inode *inode, int mask) 18362ab9cd1cSSteven Whitehouse { 18372ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 18382ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18392ab9cd1cSSteven Whitehouse int error; 18402ab9cd1cSSteven Whitehouse 18416df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 18422ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 18432ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 184410556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 18452ab9cd1cSSteven Whitehouse return -ECHILD; 18462ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 18472ab9cd1cSSteven Whitehouse if (error) 18482ab9cd1cSSteven Whitehouse return error; 18492ab9cd1cSSteven Whitehouse } 18502ab9cd1cSSteven Whitehouse 18512ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1852337684a1SEryu Guan error = -EPERM; 18532ab9cd1cSSteven Whitehouse else 18542830ba7fSAl Viro error = generic_permission(inode, mask); 18556df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 18562ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 18572ab9cd1cSSteven Whitehouse 18582ab9cd1cSSteven Whitehouse return error; 18592ab9cd1cSSteven Whitehouse } 18602ab9cd1cSSteven Whitehouse 1861ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18622ab9cd1cSSteven Whitehouse { 18632ab9cd1cSSteven Whitehouse setattr_copy(inode, attr); 18642ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 18652ab9cd1cSSteven Whitehouse return 0; 18662ab9cd1cSSteven Whitehouse } 18672ab9cd1cSSteven Whitehouse 18682ab9cd1cSSteven Whitehouse /** 18692ab9cd1cSSteven Whitehouse * gfs2_setattr_simple - 18702ab9cd1cSSteven Whitehouse * @ip: 18712ab9cd1cSSteven Whitehouse * @attr: 18722ab9cd1cSSteven Whitehouse * 18732ab9cd1cSSteven Whitehouse * Returns: errno 18742ab9cd1cSSteven Whitehouse */ 18752ab9cd1cSSteven Whitehouse 1876ab9bbda0SSteven Whitehouse int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18772ab9cd1cSSteven Whitehouse { 18782ab9cd1cSSteven Whitehouse int error; 18792ab9cd1cSSteven Whitehouse 18802ab9cd1cSSteven Whitehouse if (current->journal_info) 1881ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 18822ab9cd1cSSteven Whitehouse 1883ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 18842ab9cd1cSSteven Whitehouse if (error) 18852ab9cd1cSSteven Whitehouse return error; 18862ab9cd1cSSteven Whitehouse 1887ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1888ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 18892ab9cd1cSSteven Whitehouse return error; 18902ab9cd1cSSteven Whitehouse } 18912ab9cd1cSSteven Whitehouse 18922ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 18932ab9cd1cSSteven Whitehouse { 18942ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18952ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 18967c06b5d6SEric W. Biederman kuid_t ouid, nuid; 18977c06b5d6SEric W. Biederman kgid_t ogid, ngid; 18982ab9cd1cSSteven Whitehouse int error; 1899b8fbf471SAbhi Das struct gfs2_alloc_parms ap; 19002ab9cd1cSSteven Whitehouse 19012ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 19022ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 19032ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 19042ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 19052ab9cd1cSSteven Whitehouse 19066b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1907f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 19086b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1909f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 19102fba46a0SBob Peterson error = gfs2_qa_get(ip); 191162e96cf8SBob Peterson if (error) 19122fba46a0SBob Peterson return error; 191362e96cf8SBob Peterson 191462e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 191562e96cf8SBob Peterson if (error) 191662e96cf8SBob Peterson goto out; 191762e96cf8SBob Peterson 191862e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 191962e96cf8SBob Peterson if (error) 192062e96cf8SBob Peterson goto out; 192162e96cf8SBob Peterson 1922b8fbf471SAbhi Das ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1923b8fbf471SAbhi Das 19246b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19256b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1926b8fbf471SAbhi Das error = gfs2_quota_check(ip, nuid, ngid, &ap); 19272ab9cd1cSSteven Whitehouse if (error) 19282ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19292ab9cd1cSSteven Whitehouse } 19302ab9cd1cSSteven Whitehouse 19312ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 19322ab9cd1cSSteven Whitehouse if (error) 19332ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19342ab9cd1cSSteven Whitehouse 1935ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 19362ab9cd1cSSteven Whitehouse if (error) 19372ab9cd1cSSteven Whitehouse goto out_end_trans; 19382ab9cd1cSSteven Whitehouse 19396b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19406b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 194139a72580SAbhi Das gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1942b8fbf471SAbhi Das gfs2_quota_change(ip, ap.target, nuid, ngid); 19432ab9cd1cSSteven Whitehouse } 19442ab9cd1cSSteven Whitehouse 19452ab9cd1cSSteven Whitehouse out_end_trans: 19462ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 19472ab9cd1cSSteven Whitehouse out_gunlock_q: 19482ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 194962e96cf8SBob Peterson out: 19502fba46a0SBob Peterson gfs2_qa_put(ip); 19512ab9cd1cSSteven Whitehouse return error; 19522ab9cd1cSSteven Whitehouse } 19532ab9cd1cSSteven Whitehouse 19542ab9cd1cSSteven Whitehouse /** 19552ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 19562ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 19572ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 19582ab9cd1cSSteven Whitehouse * 19592ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 19602ab9cd1cSSteven Whitehouse * that change out to disk. 19612ab9cd1cSSteven Whitehouse * 19622ab9cd1cSSteven Whitehouse * Returns: errno 19632ab9cd1cSSteven Whitehouse */ 19642ab9cd1cSSteven Whitehouse 19652ab9cd1cSSteven Whitehouse static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 19662ab9cd1cSSteven Whitehouse { 19672b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 19682ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19692ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 19702ab9cd1cSSteven Whitehouse int error; 19712ab9cd1cSSteven Whitehouse 19722fba46a0SBob Peterson error = gfs2_qa_get(ip); 19730a305e49SBob Peterson if (error) 19740a305e49SBob Peterson return error; 19750a305e49SBob Peterson 19762ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 19772ab9cd1cSSteven Whitehouse if (error) 19782fba46a0SBob Peterson goto out; 19792ab9cd1cSSteven Whitehouse 19802ab9cd1cSSteven Whitehouse error = -EPERM; 19812ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 19822fba46a0SBob Peterson goto error; 19832ab9cd1cSSteven Whitehouse 198431051c85SJan Kara error = setattr_prepare(dentry, attr); 19852ab9cd1cSSteven Whitehouse if (error) 19862fba46a0SBob Peterson goto error; 19872ab9cd1cSSteven Whitehouse 19882ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 19892ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 19902ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 19912ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 1992e01580bfSChristoph Hellwig else { 1993ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 1994e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 1995e01580bfSChristoph Hellwig error = posix_acl_chmod(inode, inode->i_mode); 1996e01580bfSChristoph Hellwig } 19972ab9cd1cSSteven Whitehouse 19982fba46a0SBob Peterson error: 19992ab9cd1cSSteven Whitehouse if (!error) 20002ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 2001ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 20022fba46a0SBob Peterson out: 20032fba46a0SBob Peterson gfs2_qa_put(ip); 20042ab9cd1cSSteven Whitehouse return error; 20052ab9cd1cSSteven Whitehouse } 20062ab9cd1cSSteven Whitehouse 20072ab9cd1cSSteven Whitehouse /** 20082ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 2009a528d35eSDavid Howells * @path: Object to query 20102ab9cd1cSSteven Whitehouse * @stat: The inode's stats 2011a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 2012a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 20132ab9cd1cSSteven Whitehouse * 20142ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 20152ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 20162ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 20172ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 20182ab9cd1cSSteven Whitehouse * with the glock already held. 20192ab9cd1cSSteven Whitehouse * 20202ab9cd1cSSteven Whitehouse * Returns: errno 20212ab9cd1cSSteven Whitehouse */ 20222ab9cd1cSSteven Whitehouse 2023a528d35eSDavid Howells static int gfs2_getattr(const struct path *path, struct kstat *stat, 2024a528d35eSDavid Howells u32 request_mask, unsigned int flags) 20252ab9cd1cSSteven Whitehouse { 2026a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 20272ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20282ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 2029b2623c2fSAndreas Gruenbacher u32 gfsflags; 20302ab9cd1cSSteven Whitehouse int error; 20312ab9cd1cSSteven Whitehouse 20326df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 20332ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 20342ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 20352ab9cd1cSSteven Whitehouse if (error) 20362ab9cd1cSSteven Whitehouse return error; 20372ab9cd1cSSteven Whitehouse } 20382ab9cd1cSSteven Whitehouse 2039b2623c2fSAndreas Gruenbacher gfsflags = ip->i_diskflags; 2040b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_APPENDONLY) 2041b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_APPEND; 2042b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_IMMUTABLE) 2043b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_IMMUTABLE; 2044b2623c2fSAndreas Gruenbacher 2045b2623c2fSAndreas Gruenbacher stat->attributes_mask |= (STATX_ATTR_APPEND | 2046b2623c2fSAndreas Gruenbacher STATX_ATTR_COMPRESSED | 2047b2623c2fSAndreas Gruenbacher STATX_ATTR_ENCRYPTED | 2048b2623c2fSAndreas Gruenbacher STATX_ATTR_IMMUTABLE | 2049b2623c2fSAndreas Gruenbacher STATX_ATTR_NODUMP); 2050b2623c2fSAndreas Gruenbacher 20512ab9cd1cSSteven Whitehouse generic_fillattr(inode, stat); 2052b2623c2fSAndreas Gruenbacher 20536df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 20542ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 20552ab9cd1cSSteven Whitehouse 20562ab9cd1cSSteven Whitehouse return 0; 20572ab9cd1cSSteven Whitehouse } 20582ab9cd1cSSteven Whitehouse 20592ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 20602ab9cd1cSSteven Whitehouse u64 start, u64 len) 20612ab9cd1cSSteven Whitehouse { 20622ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20632ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 20642ab9cd1cSSteven Whitehouse int ret; 20652ab9cd1cSSteven Whitehouse 2066aac1a55bSBob Peterson inode_lock_shared(inode); 20672ab9cd1cSSteven Whitehouse 20682ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20692ab9cd1cSSteven Whitehouse if (ret) 20702ab9cd1cSSteven Whitehouse goto out; 20712ab9cd1cSSteven Whitehouse 2072aac1a55bSBob Peterson ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 20732ab9cd1cSSteven Whitehouse 20742ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 2075aac1a55bSBob Peterson 20762ab9cd1cSSteven Whitehouse out: 2077aac1a55bSBob Peterson inode_unlock_shared(inode); 20782ab9cd1cSSteven Whitehouse return ret; 20792ab9cd1cSSteven Whitehouse } 20802ab9cd1cSSteven Whitehouse 20813a27411cSAndreas Gruenbacher loff_t gfs2_seek_data(struct file *file, loff_t offset) 20823a27411cSAndreas Gruenbacher { 20833a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 20843a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 20853a27411cSAndreas Gruenbacher struct gfs2_holder gh; 20863a27411cSAndreas Gruenbacher loff_t ret; 20873a27411cSAndreas Gruenbacher 20883a27411cSAndreas Gruenbacher inode_lock_shared(inode); 20893a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20903a27411cSAndreas Gruenbacher if (!ret) 20913a27411cSAndreas Gruenbacher ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 20923a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 20933a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 20943a27411cSAndreas Gruenbacher 20953a27411cSAndreas Gruenbacher if (ret < 0) 20963a27411cSAndreas Gruenbacher return ret; 20973a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 20983a27411cSAndreas Gruenbacher } 20993a27411cSAndreas Gruenbacher 21003a27411cSAndreas Gruenbacher loff_t gfs2_seek_hole(struct file *file, loff_t offset) 21013a27411cSAndreas Gruenbacher { 21023a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21033a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21043a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21053a27411cSAndreas Gruenbacher loff_t ret; 21063a27411cSAndreas Gruenbacher 21073a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21083a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21093a27411cSAndreas Gruenbacher if (!ret) 21103a27411cSAndreas Gruenbacher ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 21113a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21123a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21133a27411cSAndreas Gruenbacher 21143a27411cSAndreas Gruenbacher if (ret < 0) 21153a27411cSAndreas Gruenbacher return ret; 21163a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21173a27411cSAndreas Gruenbacher } 21183a27411cSAndreas Gruenbacher 2119*82e938bdSAndreas Gruenbacher static int gfs2_update_time(struct inode *inode, struct timespec64 *time, 2120*82e938bdSAndreas Gruenbacher int flags) 2121*82e938bdSAndreas Gruenbacher { 2122*82e938bdSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 2123*82e938bdSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_gl; 2124*82e938bdSAndreas Gruenbacher struct gfs2_holder *gh; 2125*82e938bdSAndreas Gruenbacher int error; 2126*82e938bdSAndreas Gruenbacher 2127*82e938bdSAndreas Gruenbacher gh = gfs2_glock_is_locked_by_me(gl); 2128*82e938bdSAndreas Gruenbacher if (gh && !gfs2_glock_is_held_excl(gl)) { 2129*82e938bdSAndreas Gruenbacher gfs2_glock_dq(gh); 2130*82e938bdSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); 2131*82e938bdSAndreas Gruenbacher error = gfs2_glock_nq(gh); 2132*82e938bdSAndreas Gruenbacher if (error) 2133*82e938bdSAndreas Gruenbacher return error; 2134*82e938bdSAndreas Gruenbacher } 2135*82e938bdSAndreas Gruenbacher return generic_update_time(inode, time, flags); 2136*82e938bdSAndreas Gruenbacher } 2137*82e938bdSAndreas Gruenbacher 21382ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_file_iops = { 21392ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21402ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21412ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21422ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21432ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21444e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 2145e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 2146*82e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21472ab9cd1cSSteven Whitehouse }; 21482ab9cd1cSSteven Whitehouse 21492ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_dir_iops = { 21502ab9cd1cSSteven Whitehouse .create = gfs2_create, 21512ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 21522ab9cd1cSSteven Whitehouse .link = gfs2_link, 21532ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 21542ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 21552ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 21562ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 21572ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 21582773bf00SMiklos Szeredi .rename = gfs2_rename2, 21592ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21602ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21612ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21622ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21632ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21644e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 2165e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 2166*82e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21676d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 21682ab9cd1cSSteven Whitehouse }; 21692ab9cd1cSSteven Whitehouse 21702ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_symlink_iops = { 21716b255391SAl Viro .get_link = gfs2_get_link, 21722ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21732ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21742ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21752ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21762ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21772ab9cd1cSSteven Whitehouse }; 21782ab9cd1cSSteven Whitehouse 2179