17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 22ab9cd1cSSteven Whitehouse /* 32ab9cd1cSSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4f2741d98SSteven Whitehouse * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 52ab9cd1cSSteven Whitehouse */ 62ab9cd1cSSteven Whitehouse 72ab9cd1cSSteven Whitehouse #include <linux/slab.h> 82ab9cd1cSSteven Whitehouse #include <linux/spinlock.h> 92ab9cd1cSSteven Whitehouse #include <linux/completion.h> 102ab9cd1cSSteven Whitehouse #include <linux/buffer_head.h> 112ab9cd1cSSteven Whitehouse #include <linux/namei.h> 122ab9cd1cSSteven Whitehouse #include <linux/mm.h> 135b825c3aSIngo Molnar #include <linux/cred.h> 142ab9cd1cSSteven Whitehouse #include <linux/xattr.h> 152ab9cd1cSSteven Whitehouse #include <linux/posix_acl.h> 162ab9cd1cSSteven Whitehouse #include <linux/gfs2_ondisk.h> 172ab9cd1cSSteven Whitehouse #include <linux/crc32.h> 18aac1a55bSBob Peterson #include <linux/iomap.h> 192ab9cd1cSSteven Whitehouse #include <linux/security.h> 2010c5db28SChristoph Hellwig #include <linux/fiemap.h> 217c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 222ab9cd1cSSteven Whitehouse 232ab9cd1cSSteven Whitehouse #include "gfs2.h" 242ab9cd1cSSteven Whitehouse #include "incore.h" 252ab9cd1cSSteven Whitehouse #include "acl.h" 262ab9cd1cSSteven Whitehouse #include "bmap.h" 272ab9cd1cSSteven Whitehouse #include "dir.h" 282ab9cd1cSSteven Whitehouse #include "xattr.h" 292ab9cd1cSSteven Whitehouse #include "glock.h" 302ab9cd1cSSteven Whitehouse #include "inode.h" 312ab9cd1cSSteven Whitehouse #include "meta_io.h" 322ab9cd1cSSteven Whitehouse #include "quota.h" 332ab9cd1cSSteven Whitehouse #include "rgrp.h" 342ab9cd1cSSteven Whitehouse #include "trans.h" 352ab9cd1cSSteven Whitehouse #include "util.h" 362ab9cd1cSSteven Whitehouse #include "super.h" 372ab9cd1cSSteven Whitehouse #include "glops.h" 382ab9cd1cSSteven Whitehouse 39e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops; 40e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops; 41e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops; 42e3a77eebSAndreas Gruenbacher 43cda9dd42SAndreas Gruenbacher static int iget_test(struct inode *inode, void *opaque) 442ab9cd1cSSteven Whitehouse { 45cda9dd42SAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 46cda9dd42SAndreas Gruenbacher 47cda9dd42SAndreas Gruenbacher return GFS2_I(inode)->i_no_addr == no_addr; 48cda9dd42SAndreas Gruenbacher } 49cda9dd42SAndreas Gruenbacher 50cda9dd42SAndreas Gruenbacher static int iget_set(struct inode *inode, void *opaque) 51cda9dd42SAndreas Gruenbacher { 52cda9dd42SAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 53cda9dd42SAndreas Gruenbacher 54cda9dd42SAndreas Gruenbacher GFS2_I(inode)->i_no_addr = no_addr; 55cda9dd42SAndreas Gruenbacher inode->i_ino = no_addr; 56cda9dd42SAndreas Gruenbacher return 0; 57cda9dd42SAndreas Gruenbacher } 58cda9dd42SAndreas Gruenbacher 593ce37b2cSAndreas Gruenbacher static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) 603ce37b2cSAndreas Gruenbacher { 613ce37b2cSAndreas Gruenbacher struct inode *inode; 623ce37b2cSAndreas Gruenbacher 633ce37b2cSAndreas Gruenbacher repeat: 64cda9dd42SAndreas Gruenbacher inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 653ce37b2cSAndreas Gruenbacher if (!inode) 663ce37b2cSAndreas Gruenbacher return inode; 673ce37b2cSAndreas Gruenbacher if (is_bad_inode(inode)) { 683ce37b2cSAndreas Gruenbacher iput(inode); 693ce37b2cSAndreas Gruenbacher goto repeat; 703ce37b2cSAndreas Gruenbacher } 713ce37b2cSAndreas Gruenbacher return inode; 722ab9cd1cSSteven Whitehouse } 732ab9cd1cSSteven Whitehouse 742ab9cd1cSSteven Whitehouse /** 752ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 762ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 772ab9cd1cSSteven Whitehouse * 782ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 792ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 802ab9cd1cSSteven Whitehouse */ 812ab9cd1cSSteven Whitehouse 822ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 832ab9cd1cSSteven Whitehouse { 842ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 852ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 862ab9cd1cSSteven Whitehouse 872ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 882ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 892ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 902ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 912ab9cd1cSSteven Whitehouse else 922ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 932ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 942ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 952ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 962ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 972ab9cd1cSSteven Whitehouse else 982ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 992ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 1002ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 1012ab9cd1cSSteven Whitehouse } else { 1022ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1032ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 1042ab9cd1cSSteven Whitehouse } 1052ab9cd1cSSteven Whitehouse } 1062ab9cd1cSSteven Whitehouse 1072ab9cd1cSSteven Whitehouse /** 1082ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 1092ab9cd1cSSteven Whitehouse * @sb: The super block 1102ab9cd1cSSteven Whitehouse * @type: The type of the inode 1113ce37b2cSAndreas Gruenbacher * @no_addr: The inode number 1123ce37b2cSAndreas Gruenbacher * @no_formal_ino: The inode generation number 1133ce37b2cSAndreas Gruenbacher * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 11461b91cfdSAndreas Gruenbacher * GFS2_BLKST_FREE to indicate not to verify) 1153ce37b2cSAndreas Gruenbacher * 1163ce37b2cSAndreas Gruenbacher * If @type is DT_UNKNOWN, the inode type is fetched from disk. 1173ce37b2cSAndreas Gruenbacher * 1183ce37b2cSAndreas Gruenbacher * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 1193ce37b2cSAndreas Gruenbacher * placeholder because it doesn't otherwise make sense), the on-disk block type 1203ce37b2cSAndreas Gruenbacher * is verified to be @blktype. 1212ab9cd1cSSteven Whitehouse * 122b66648adSAndreas Gruenbacher * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE) 123b66648adSAndreas Gruenbacher * if it detects that @no_formal_ino doesn't match the actual inode generation 124b66648adSAndreas Gruenbacher * number. However, it doesn't always know unless @type is DT_UNKNOWN. 125b66648adSAndreas Gruenbacher * 1262ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1272ab9cd1cSSteven Whitehouse */ 1282ab9cd1cSSteven Whitehouse 1292ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1303ce37b2cSAndreas Gruenbacher u64 no_addr, u64 no_formal_ino, 1313ce37b2cSAndreas Gruenbacher unsigned int blktype) 1322ab9cd1cSSteven Whitehouse { 1332ab9cd1cSSteven Whitehouse struct inode *inode; 1342ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1352ab9cd1cSSteven Whitehouse struct gfs2_glock *io_gl = NULL; 1363ce37b2cSAndreas Gruenbacher struct gfs2_holder i_gh; 1372ab9cd1cSSteven Whitehouse int error; 1382ab9cd1cSSteven Whitehouse 1396df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 1403ce37b2cSAndreas Gruenbacher inode = gfs2_iget(sb, no_addr); 1412ab9cd1cSSteven Whitehouse if (!inode) 142ac3beb6aSSteven Whitehouse return ERR_PTR(-ENOMEM); 1432ab9cd1cSSteven Whitehouse 144e97321faSBob Peterson ip = GFS2_I(inode); 145e97321faSBob Peterson 1462ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1472ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1482ab9cd1cSSteven Whitehouse 1492ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 1502ab9cd1cSSteven Whitehouse if (unlikely(error)) 1512ab9cd1cSSteven Whitehouse goto fail; 1524fd1a579SAndreas Gruenbacher flush_delayed_work(&ip->i_gl->gl_work); 1532ab9cd1cSSteven Whitehouse 1542ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 1552ab9cd1cSSteven Whitehouse if (unlikely(error)) 15640e7e86eSAndreas Gruenbacher goto fail; 157dd0ecf54SAndreas Gruenbacher if (blktype != GFS2_BLKST_UNLINKED) 158dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 1592ab9cd1cSSteven Whitehouse 1603ce37b2cSAndreas Gruenbacher if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 1613ce37b2cSAndreas Gruenbacher /* 1623ce37b2cSAndreas Gruenbacher * The GL_SKIP flag indicates to skip reading the inode 1633ce37b2cSAndreas Gruenbacher * block. We read the inode with gfs2_inode_refresh 1643ce37b2cSAndreas Gruenbacher * after possibly checking the block type. 1653ce37b2cSAndreas Gruenbacher */ 1663ce37b2cSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 1673ce37b2cSAndreas Gruenbacher GL_SKIP, &i_gh); 1683ce37b2cSAndreas Gruenbacher if (error) 16940e7e86eSAndreas Gruenbacher goto fail; 1703ce37b2cSAndreas Gruenbacher 171b66648adSAndreas Gruenbacher error = -ESTALE; 172b66648adSAndreas Gruenbacher if (no_formal_ino && 173b66648adSAndreas Gruenbacher gfs2_inode_already_deleted(ip->i_gl, no_formal_ino)) 174b66648adSAndreas Gruenbacher goto fail; 175b66648adSAndreas Gruenbacher 1763ce37b2cSAndreas Gruenbacher if (blktype != GFS2_BLKST_FREE) { 1773ce37b2cSAndreas Gruenbacher error = gfs2_check_blk_type(sdp, no_addr, 1783ce37b2cSAndreas Gruenbacher blktype); 1793ce37b2cSAndreas Gruenbacher if (error) 18040e7e86eSAndreas Gruenbacher goto fail; 1813ce37b2cSAndreas Gruenbacher } 1823ce37b2cSAndreas Gruenbacher } 1833ce37b2cSAndreas Gruenbacher 1844d7c18c7SBob Peterson glock_set_object(ip->i_gl, ip); 1852ab9cd1cSSteven Whitehouse set_bit(GIF_INVALID, &ip->i_flags); 1862ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 1872ab9cd1cSSteven Whitehouse if (unlikely(error)) 18840e7e86eSAndreas Gruenbacher goto fail; 1894fd1a579SAndreas Gruenbacher glock_set_object(ip->i_iopen_gh.gh_gl, ip); 1902ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1912ab9cd1cSSteven Whitehouse io_gl = NULL; 1922ab9cd1cSSteven Whitehouse 1932b0fb353SAndreas Gruenbacher /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 1942b0fb353SAndreas Gruenbacher inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 1952b0fb353SAndreas Gruenbacher inode->i_atime.tv_nsec = 0; 1962b0fb353SAndreas Gruenbacher 1972ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1982ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 1992ab9cd1cSSteven Whitehouse error = gfs2_inode_refresh(GFS2_I(inode)); 2002ab9cd1cSSteven Whitehouse if (error) 20140e7e86eSAndreas Gruenbacher goto fail; 2022ab9cd1cSSteven Whitehouse } else { 2032b0fb353SAndreas Gruenbacher ip->i_no_formal_ino = no_formal_ino; 2042ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 2052ab9cd1cSSteven Whitehouse } 2062ab9cd1cSSteven Whitehouse 2076df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2083ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 209b66648adSAndreas Gruenbacher 210b66648adSAndreas Gruenbacher gfs2_set_iop(inode); 211b66648adSAndreas Gruenbacher } 212b66648adSAndreas Gruenbacher 213b66648adSAndreas Gruenbacher if (no_formal_ino && ip->i_no_formal_ino && 214b66648adSAndreas Gruenbacher no_formal_ino != ip->i_no_formal_ino) { 2155902f4ddSAndreas Gruenbacher error = -ESTALE; 216b66648adSAndreas Gruenbacher if (inode->i_state & I_NEW) 217b66648adSAndreas Gruenbacher goto fail; 218b66648adSAndreas Gruenbacher iput(inode); 2195902f4ddSAndreas Gruenbacher return ERR_PTR(error); 220b66648adSAndreas Gruenbacher } 221b66648adSAndreas Gruenbacher 222b66648adSAndreas Gruenbacher if (inode->i_state & I_NEW) 223b66648adSAndreas Gruenbacher unlock_new_inode(inode); 224b66648adSAndreas Gruenbacher 2252ab9cd1cSSteven Whitehouse return inode; 2262ab9cd1cSSteven Whitehouse 22740e7e86eSAndreas Gruenbacher fail: 2282ab9cd1cSSteven Whitehouse if (io_gl) 2292ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 2306df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2313ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 2322ab9cd1cSSteven Whitehouse iget_failed(inode); 2332ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2342ab9cd1cSSteven Whitehouse } 2352ab9cd1cSSteven Whitehouse 2366bdcadeaSAndreas Gruenbacher /** 2376bdcadeaSAndreas Gruenbacher * gfs2_lookup_by_inum - look up an inode by inode number 2386bdcadeaSAndreas Gruenbacher * @sdp: The super block 2396bdcadeaSAndreas Gruenbacher * @no_addr: The inode number 2406bdcadeaSAndreas Gruenbacher * @no_formal_ino: The inode generation number (0 for any) 2416bdcadeaSAndreas Gruenbacher * @blktype: Requested block type (see gfs2_inode_lookup) 2426bdcadeaSAndreas Gruenbacher */ 2432ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2446bdcadeaSAndreas Gruenbacher u64 no_formal_ino, unsigned int blktype) 2452ab9cd1cSSteven Whitehouse { 2462ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2473ce37b2cSAndreas Gruenbacher struct inode *inode; 2482ab9cd1cSSteven Whitehouse int error; 2492ab9cd1cSSteven Whitehouse 250b66648adSAndreas Gruenbacher inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, 251b66648adSAndreas Gruenbacher blktype); 2522ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2533ce37b2cSAndreas Gruenbacher return inode; 2542ab9cd1cSSteven Whitehouse 2552ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2562ab9cd1cSSteven Whitehouse error = -EIO; 2572ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2582ab9cd1cSSteven Whitehouse goto fail_iput; 2592ab9cd1cSSteven Whitehouse } 2603ce37b2cSAndreas Gruenbacher return inode; 2612ab9cd1cSSteven Whitehouse 2622ab9cd1cSSteven Whitehouse fail_iput: 2632ab9cd1cSSteven Whitehouse iput(inode); 2643ce37b2cSAndreas Gruenbacher return ERR_PTR(error); 2652ab9cd1cSSteven Whitehouse } 2662ab9cd1cSSteven Whitehouse 2672ab9cd1cSSteven Whitehouse 2682ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2692ab9cd1cSSteven Whitehouse { 2702ab9cd1cSSteven Whitehouse struct qstr qstr; 2712ab9cd1cSSteven Whitehouse struct inode *inode; 2722ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2732ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2742ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2752ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2762ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2772ab9cd1cSSteven Whitehouse * and do not check for NULL. 2782ab9cd1cSSteven Whitehouse */ 2792ab9cd1cSSteven Whitehouse if (inode == NULL) 2802ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2812ab9cd1cSSteven Whitehouse else 2822ab9cd1cSSteven Whitehouse return inode; 2832ab9cd1cSSteven Whitehouse } 2842ab9cd1cSSteven Whitehouse 2852ab9cd1cSSteven Whitehouse 2862ab9cd1cSSteven Whitehouse /** 2872ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 2882ab9cd1cSSteven Whitehouse * @d_gh: An initialized holder for the directory glock 2892ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2902ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2912ab9cd1cSSteven Whitehouse * @i_gh: An uninitialized holder for the new inode glock 2922ab9cd1cSSteven Whitehouse * 2932ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2942ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2952ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2962ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2972ab9cd1cSSteven Whitehouse * 2982ab9cd1cSSteven Whitehouse * Returns: errno 2992ab9cd1cSSteven Whitehouse */ 3002ab9cd1cSSteven Whitehouse 3012ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 3022ab9cd1cSSteven Whitehouse int is_root) 3032ab9cd1cSSteven Whitehouse { 3042ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 3052ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 3062ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 3072ab9cd1cSSteven Whitehouse int error = 0; 3082ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 3092ab9cd1cSSteven Whitehouse 3106df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&d_gh); 3112ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 3122ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 3132ab9cd1cSSteven Whitehouse 3142ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 3152ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 3162b0143b5SDavid Howells dir == d_inode(sb->s_root))) { 3172ab9cd1cSSteven Whitehouse igrab(dir); 3182ab9cd1cSSteven Whitehouse return dir; 3192ab9cd1cSSteven Whitehouse } 3202ab9cd1cSSteven Whitehouse 3212ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3222ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3232ab9cd1cSSteven Whitehouse if (error) 3242ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3252ab9cd1cSSteven Whitehouse } 3262ab9cd1cSSteven Whitehouse 3272ab9cd1cSSteven Whitehouse if (!is_root) { 32810556cb2SAl Viro error = gfs2_permission(dir, MAY_EXEC); 3292ab9cd1cSSteven Whitehouse if (error) 3302ab9cd1cSSteven Whitehouse goto out; 3312ab9cd1cSSteven Whitehouse } 3322ab9cd1cSSteven Whitehouse 3335a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3342ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3352ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3362ab9cd1cSSteven Whitehouse out: 3376df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&d_gh)) 3382ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3392ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3402ab9cd1cSSteven Whitehouse return NULL; 3412ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3422ab9cd1cSSteven Whitehouse } 3432ab9cd1cSSteven Whitehouse 3442ab9cd1cSSteven Whitehouse /** 3452ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3462ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3472ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3482ab9cd1cSSteven Whitehouse * @mode: 3492ab9cd1cSSteven Whitehouse * 3502ab9cd1cSSteven Whitehouse * Returns: errno 3512ab9cd1cSSteven Whitehouse */ 3522ab9cd1cSSteven Whitehouse 3532ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 354175a4eb7SAl Viro umode_t mode) 3552ab9cd1cSSteven Whitehouse { 3562ab9cd1cSSteven Whitehouse int error; 3572ab9cd1cSSteven Whitehouse 35810556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 3592ab9cd1cSSteven Whitehouse if (error) 3602ab9cd1cSSteven Whitehouse return error; 3612ab9cd1cSSteven Whitehouse 3622ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3632ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3642ab9cd1cSSteven Whitehouse return -ENOENT; 3652ab9cd1cSSteven Whitehouse 3662ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3672ab9cd1cSSteven Whitehouse return -EFBIG; 3682ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3692ab9cd1cSSteven Whitehouse return -EMLINK; 3702ab9cd1cSSteven Whitehouse 3712ab9cd1cSSteven Whitehouse return 0; 3722ab9cd1cSSteven Whitehouse } 3732ab9cd1cSSteven Whitehouse 374c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 375c9aecf73SSteven Whitehouse struct inode *inode) 3762ab9cd1cSSteven Whitehouse { 3772ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3786b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3796b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 380c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 381c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3826b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 383c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 384c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3852ab9cd1cSSteven Whitehouse } else 386c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3872ab9cd1cSSteven Whitehouse 3882ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 389c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 390c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 391c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3922ab9cd1cSSteven Whitehouse } else 393c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3942ab9cd1cSSteven Whitehouse } 3952ab9cd1cSSteven Whitehouse 396b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 3972ab9cd1cSSteven Whitehouse { 398c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 399b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 4002ab9cd1cSSteven Whitehouse int error; 4012ab9cd1cSSteven Whitehouse 402b8fbf471SAbhi Das error = gfs2_quota_lock_check(ip, &ap); 4032ab9cd1cSSteven Whitehouse if (error) 4042ab9cd1cSSteven Whitehouse goto out; 4052ab9cd1cSSteven Whitehouse 4067b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 407fd4b4e04SSteven Whitehouse if (error) 408fd4b4e04SSteven Whitehouse goto out_quota; 409fd4b4e04SSteven Whitehouse 410b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 4112ab9cd1cSSteven Whitehouse if (error) 4122ab9cd1cSSteven Whitehouse goto out_ipreserv; 4132ab9cd1cSSteven Whitehouse 414b2c8b3eaSSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 415c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 416c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 417c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 4182ab9cd1cSSteven Whitehouse 4192ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4202ab9cd1cSSteven Whitehouse 4212ab9cd1cSSteven Whitehouse out_ipreserv: 422c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 423fd4b4e04SSteven Whitehouse out_quota: 424fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4252ab9cd1cSSteven Whitehouse out: 4262ab9cd1cSSteven Whitehouse return error; 4272ab9cd1cSSteven Whitehouse } 4282ab9cd1cSSteven Whitehouse 429f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 430f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 431e2d0a13bSSteven Whitehouse { 432e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 433e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 434e2d0a13bSSteven Whitehouse 435e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 436e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 437e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 438e2d0a13bSSteven Whitehouse 439e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 440e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 441e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 442e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 443e2d0a13bSSteven Whitehouse 444e2d0a13bSSteven Whitehouse } 445e2d0a13bSSteven Whitehouse 4462ab9cd1cSSteven Whitehouse /** 447b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 448b2c8b3eaSSteven Whitehouse * @ip: The inode in question 449b2c8b3eaSSteven Whitehouse * 450b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 451b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 452b2c8b3eaSSteven Whitehouse */ 453b2c8b3eaSSteven Whitehouse 454b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 455b2c8b3eaSSteven Whitehouse { 456b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 457b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 458b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 459b2c8b3eaSSteven Whitehouse 460b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 461b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 462b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 463b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 464b2c8b3eaSSteven Whitehouse 465b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 466b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 467b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 468b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 469b2c8b3eaSSteven Whitehouse 470b2c8b3eaSSteven Whitehouse brelse(bh); 471b2c8b3eaSSteven Whitehouse } 472b2c8b3eaSSteven Whitehouse 473b2c8b3eaSSteven Whitehouse /** 4742ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 475f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 476c9aecf73SSteven Whitehouse * @ip: The inode 477f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 478f2741d98SSteven Whitehouse * @bhp: The buffer head (returned to caller) 4792ab9cd1cSSteven Whitehouse * 4802ab9cd1cSSteven Whitehouse */ 4812ab9cd1cSSteven Whitehouse 482c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 48379ba7480SSteven Whitehouse const char *symname) 4842ab9cd1cSSteven Whitehouse { 4852ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4862ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4872ab9cd1cSSteven Whitehouse 488c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 489350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4902ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 49179ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4922ab9cd1cSSteven Whitehouse 493c9aecf73SSteven Whitehouse di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 494c9aecf73SSteven Whitehouse di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 4952ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4962ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4972ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4982ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4992ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 50079ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 5012ab9cd1cSSteven Whitehouse 502c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 503160b4026SSteven Whitehouse case S_IFDIR: 504e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 505160b4026SSteven Whitehouse break; 506160b4026SSteven Whitehouse case S_IFLNK: 507c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 508160b4026SSteven Whitehouse break; 509e2d0a13bSSteven Whitehouse } 510e2d0a13bSSteven Whitehouse 5112ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 51279ba7480SSteven Whitehouse brelse(dibh); 5132ab9cd1cSSteven Whitehouse } 5142ab9cd1cSSteven Whitehouse 515534cf9caSSteven Whitehouse /** 516534cf9caSSteven Whitehouse * gfs2_trans_da_blocks - Calculate number of blocks to link inode 517534cf9caSSteven Whitehouse * @dip: The directory we are linking into 518534cf9caSSteven Whitehouse * @da: The dir add information 519534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 520534cf9caSSteven Whitehouse * 521534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 522534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 523534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 524534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 525534cf9caSSteven Whitehouse * 526534cf9caSSteven Whitehouse * Returns: Number of blocks 527534cf9caSSteven Whitehouse */ 528534cf9caSSteven Whitehouse 529534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 530534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 531534cf9caSSteven Whitehouse unsigned nr_inodes) 532534cf9caSSteven Whitehouse { 533534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 534534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 535534cf9caSSteven Whitehouse } 536534cf9caSSteven Whitehouse 5372ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5383c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5392ab9cd1cSSteven Whitehouse { 5402ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5413c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5422ab9cd1cSSteven Whitehouse int error; 5432ab9cd1cSSteven Whitehouse 5443c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 545b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 5462ab9cd1cSSteven Whitehouse if (error) 5472ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5482ab9cd1cSSteven Whitehouse 5497b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5502ab9cd1cSSteven Whitehouse if (error) 5512ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5522ab9cd1cSSteven Whitehouse 553534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5542ab9cd1cSSteven Whitehouse if (error) 5552ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5562ab9cd1cSSteven Whitehouse } else { 5572ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5582ab9cd1cSSteven Whitehouse if (error) 5592ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5602ab9cd1cSSteven Whitehouse } 5612ab9cd1cSSteven Whitehouse 5622b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5632ab9cd1cSSteven Whitehouse 5642ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5652ab9cd1cSSteven Whitehouse fail_ipreserv: 5662ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5672ab9cd1cSSteven Whitehouse fail_quota_locks: 5682ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5692ab9cd1cSSteven Whitehouse return error; 5702ab9cd1cSSteven Whitehouse } 5712ab9cd1cSSteven Whitehouse 57246cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5739d8f13baSMimi Zohar void *fs_info) 5742ab9cd1cSSteven Whitehouse { 5759d8f13baSMimi Zohar const struct xattr *xattr; 5769d8f13baSMimi Zohar int err = 0; 5772ab9cd1cSSteven Whitehouse 5789d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5799d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5809d8f13baSMimi Zohar xattr->value_len, 0, 5819d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5829d8f13baSMimi Zohar if (err < 0) 5839d8f13baSMimi Zohar break; 5849d8f13baSMimi Zohar } 5852ab9cd1cSSteven Whitehouse return err; 5862ab9cd1cSSteven Whitehouse } 5872ab9cd1cSSteven Whitehouse 5882ab9cd1cSSteven Whitehouse /** 589f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 590f2741d98SSteven Whitehouse * @dir: The parent directory 591f2741d98SSteven Whitehouse * @dentry: The new dentry 5926d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 593f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 594f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 595f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 596f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 5972ab9cd1cSSteven Whitehouse * 598f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 5992ab9cd1cSSteven Whitehouse */ 6002ab9cd1cSSteven Whitehouse 601f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 6026d4ade98SSteven Whitehouse struct file *file, 603175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 604b452a458SAl Viro unsigned int size, int excl) 6052ab9cd1cSSteven Whitehouse { 606f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 607e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 608f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 6092ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 6108e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 6112ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 612a55a47a3SAndreas Gruenbacher struct gfs2_glock *io_gl; 613783013c0SBob Peterson int error, free_vfs_inode = 1; 6149dbe9610SSteven Whitehouse u32 aflags = 0; 615b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 61619aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 6172ab9cd1cSSteven Whitehouse 6182ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 619f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6202ab9cd1cSSteven Whitehouse 6212fba46a0SBob Peterson error = gfs2_qa_get(dip); 6220a305e49SBob Peterson if (error) 6230a305e49SBob Peterson return error; 6240a305e49SBob Peterson 625fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 626fd4b4e04SSteven Whitehouse if (error) 6272fba46a0SBob Peterson goto fail; 628fd4b4e04SSteven Whitehouse 629f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 6302ab9cd1cSSteven Whitehouse if (error) 6312ab9cd1cSSteven Whitehouse goto fail; 632e0b62e21SAndreas Gruenbacher gfs2_holder_mark_uninitialized(ghs + 1); 6332ab9cd1cSSteven Whitehouse 6342ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6352ab9cd1cSSteven Whitehouse if (error) 6362ab9cd1cSSteven Whitehouse goto fail_gunlock; 6372ab9cd1cSSteven Whitehouse 6385a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6395a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6405a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 641571a4b57SAl Viro if (S_ISDIR(inode->i_mode)) { 642571a4b57SAl Viro iput(inode); 643571a4b57SAl Viro inode = ERR_PTR(-EISDIR); 644571a4b57SAl Viro goto fail_gunlock; 645571a4b57SAl Viro } 64644bb31baSAl Viro d_instantiate(dentry, inode); 6476d4ade98SSteven Whitehouse error = 0; 6480d0d1107SMiklos Szeredi if (file) { 64944bb31baSAl Viro if (S_ISREG(inode->i_mode)) 650be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 65144bb31baSAl Viro else 65244bb31baSAl Viro error = finish_no_open(file, NULL); 6535ca1db41SMiklos Szeredi } 6545a00f3ccSSteven Whitehouse gfs2_glock_dq_uninit(ghs); 6552297ab61SBob Peterson goto fail; 6565a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6575a00f3ccSSteven Whitehouse goto fail_gunlock; 6585a00f3ccSSteven Whitehouse } 6595a00f3ccSSteven Whitehouse 6603c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 661fd4b4e04SSteven Whitehouse if (error < 0) 662fd4b4e04SSteven Whitehouse goto fail_gunlock; 663fd4b4e04SSteven Whitehouse 664c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 665fd4b4e04SSteven Whitehouse error = -ENOMEM; 666fd4b4e04SSteven Whitehouse if (!inode) 667fd4b4e04SSteven Whitehouse goto fail_gunlock; 668fd4b4e04SSteven Whitehouse 669e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 670e01580bfSChristoph Hellwig if (error) 671783013c0SBob Peterson goto fail_gunlock; 672e01580bfSChristoph Hellwig 6738e2e0047SBob Peterson ip = GFS2_I(inode); 6742fba46a0SBob Peterson error = gfs2_qa_get(ip); 675ff7f4cb4SSteven Whitehouse if (error) 676e01580bfSChristoph Hellwig goto fail_free_acls; 677c9aecf73SSteven Whitehouse 678c9aecf73SSteven Whitehouse inode->i_mode = mode; 67979ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 680c9aecf73SSteven Whitehouse inode->i_rdev = dev; 681c9aecf73SSteven Whitehouse inode->i_size = size; 682078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 683c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 68400a158beSAbhi Das check_and_update_goal(dip); 685c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 68628fb3027SSteven Whitehouse ip->i_diskflags = 0; 68728fb3027SSteven Whitehouse ip->i_eattr = 0; 68828fb3027SSteven Whitehouse ip->i_height = 0; 68928fb3027SSteven Whitehouse ip->i_depth = 0; 69028fb3027SSteven Whitehouse ip->i_entries = 0; 691cc963a11SBob Peterson ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 69228fb3027SSteven Whitehouse 69328fb3027SSteven Whitehouse switch(mode & S_IFMT) { 69428fb3027SSteven Whitehouse case S_IFREG: 69528fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 69628fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 69728fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 69828fb3027SSteven Whitehouse gfs2_set_aops(inode); 69928fb3027SSteven Whitehouse break; 70028fb3027SSteven Whitehouse case S_IFDIR: 70128fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 70228fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 70328fb3027SSteven Whitehouse ip->i_entries = 2; 70428fb3027SSteven Whitehouse break; 70528fb3027SSteven Whitehouse } 706acc546fdSAbhi Das 707acc546fdSAbhi Das /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 708acc546fdSAbhi Das if (dip->i_diskflags & GFS2_DIF_SYSTEM) 709acc546fdSAbhi Das ip->i_diskflags |= GFS2_DIF_SYSTEM; 710acc546fdSAbhi Das 71128fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 712c9aecf73SSteven Whitehouse 7132b0143b5SDavid Howells if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 7149dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7159dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7169dbe9610SSteven Whitehouse 717b2c8b3eaSSteven Whitehouse if (default_acl || acl) 718b2c8b3eaSSteven Whitehouse blocks++; 719b2c8b3eaSSteven Whitehouse 720b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 721c9aecf73SSteven Whitehouse if (error) 722c9aecf73SSteven Whitehouse goto fail_free_inode; 723c9aecf73SSteven Whitehouse 724b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 725b2c8b3eaSSteven Whitehouse 726c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 727c9aecf73SSteven Whitehouse if (error) 728c9aecf73SSteven Whitehouse goto fail_free_inode; 72998e5a91aSAndreas Gruenbacher flush_delayed_work(&ip->i_gl->gl_work); 7306f6597baSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 73198e5a91aSAndreas Gruenbacher 732dd0ecf54SAndreas Gruenbacher error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 733c9aecf73SSteven Whitehouse if (error) 734c9aecf73SSteven Whitehouse goto fail_free_inode; 735dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 736dd0ecf54SAndreas Gruenbacher glock_set_object(io_gl, ip); 737dd0ecf54SAndreas Gruenbacher 738dd0ecf54SAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 739dd0ecf54SAndreas Gruenbacher if (error) 740dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 741c9aecf73SSteven Whitehouse 742b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 743c9aecf73SSteven Whitehouse if (error) 744dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 7450a305e49SBob Peterson 746b2c8b3eaSSteven Whitehouse if (blocks > 1) { 747b2c8b3eaSSteven Whitehouse ip->i_eattr = ip->i_no_addr + 1; 748b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 749b2c8b3eaSSteven Whitehouse } 75079ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 751fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 752fd4b4e04SSteven Whitehouse 753c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 754c9aecf73SSteven Whitehouse if (error) 755c9aecf73SSteven Whitehouse goto fail_gunlock2; 756c9aecf73SSteven Whitehouse 757c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 758c9aecf73SSteven Whitehouse insert_inode_hash(inode); 759c9aecf73SSteven Whitehouse 760783013c0SBob Peterson free_vfs_inode = 0; /* After this point, the inode is no longer 761783013c0SBob Peterson considered free. Any failures need to undo 762783013c0SBob Peterson the gfs2 structures. */ 763e01580bfSChristoph Hellwig if (default_acl) { 7641a39ba99SAl Viro error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 7652ab9cd1cSSteven Whitehouse if (error) 766c9aecf73SSteven Whitehouse goto fail_gunlock3; 7676ff9b09eSAndreas Gruenbacher posix_acl_release(default_acl); 7686ff9b09eSAndreas Gruenbacher default_acl = NULL; 7696ff9b09eSAndreas Gruenbacher } 7706ff9b09eSAndreas Gruenbacher if (acl) { 7716ff9b09eSAndreas Gruenbacher error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 7726ff9b09eSAndreas Gruenbacher if (error) 7736ff9b09eSAndreas Gruenbacher goto fail_gunlock3; 7746ff9b09eSAndreas Gruenbacher posix_acl_release(acl); 7756ff9b09eSAndreas Gruenbacher acl = NULL; 7766ff9b09eSAndreas Gruenbacher } 7772ab9cd1cSSteven Whitehouse 778f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 779f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7802ab9cd1cSSteven Whitehouse if (error) 781c9aecf73SSteven Whitehouse goto fail_gunlock3; 7822ab9cd1cSSteven Whitehouse 7833c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 7842ab9cd1cSSteven Whitehouse if (error) 785c9aecf73SSteven Whitehouse goto fail_gunlock3; 7862ab9cd1cSSteven Whitehouse 78779ba7480SSteven Whitehouse mark_inode_dirty(inode); 7886d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 7892c47c1beSBob Peterson /* After instantiate, errors should result in evict which will destroy 7902c47c1beSBob Peterson * both inode and iopen glocks properly. */ 791c5bf8fefSMiklos Szeredi if (file) { 79273a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 793be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 794c5bf8fefSMiklos Szeredi } 79528fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 7962297ab61SBob Peterson gfs2_qa_put(ip); 79728fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 7982c47c1beSBob Peterson gfs2_glock_put(io_gl); 7992297ab61SBob Peterson gfs2_qa_put(dip); 8006d4ade98SSteven Whitehouse return error; 8012ab9cd1cSSteven Whitehouse 802c9aecf73SSteven Whitehouse fail_gunlock3: 8039c1b2808SBob Peterson glock_clear_object(io_gl, ip); 804783013c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 8052ab9cd1cSSteven Whitehouse fail_gunlock2: 806dd0ecf54SAndreas Gruenbacher glock_clear_object(io_gl, ip); 8072c47c1beSBob Peterson gfs2_glock_put(io_gl); 808c9aecf73SSteven Whitehouse fail_free_inode: 8099c1b2808SBob Peterson if (ip->i_gl) { 8109c1b2808SBob Peterson glock_clear_object(ip->i_gl, ip); 8111a0b00d1SBob Peterson if (free_vfs_inode) /* else evict will do the put for us */ 812c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 8139c1b2808SBob Peterson } 8141595548fSAndreas Gruenbacher gfs2_rs_delete(ip, NULL); 8151595548fSAndreas Gruenbacher gfs2_qa_put(ip); 816e01580bfSChristoph Hellwig fail_free_acls: 817e01580bfSChristoph Hellwig posix_acl_release(default_acl); 818e01580bfSChristoph Hellwig posix_acl_release(acl); 8192ab9cd1cSSteven Whitehouse fail_gunlock: 8202b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 821f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 82215a798f7SKefeng Wang if (!IS_ERR_OR_NULL(inode)) { 82379ba7480SSteven Whitehouse clear_nlink(inode); 82405978803SAbhi Das if (!free_vfs_inode) 82579ba7480SSteven Whitehouse mark_inode_dirty(inode); 82605978803SAbhi Das set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 82705978803SAbhi Das &GFS2_I(inode)->i_flags); 82840ac218fSSteven Whitehouse iput(inode); 82940ac218fSSteven Whitehouse } 830e0b62e21SAndreas Gruenbacher if (gfs2_holder_initialized(ghs + 1)) 831e0b62e21SAndreas Gruenbacher gfs2_glock_dq_uninit(ghs + 1); 8322ab9cd1cSSteven Whitehouse fail: 8332fba46a0SBob Peterson gfs2_qa_put(dip); 834f2741d98SSteven Whitehouse return error; 8352ab9cd1cSSteven Whitehouse } 836f2741d98SSteven Whitehouse 8372ab9cd1cSSteven Whitehouse /** 8382ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 8392ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8402ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8412ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 8422ab9cd1cSSteven Whitehouse * 8432ab9cd1cSSteven Whitehouse * Returns: errno 8442ab9cd1cSSteven Whitehouse */ 8452ab9cd1cSSteven Whitehouse 8462ab9cd1cSSteven Whitehouse static int gfs2_create(struct inode *dir, struct dentry *dentry, 847ebfc3b49SAl Viro umode_t mode, bool excl) 8482ab9cd1cSSteven Whitehouse { 849b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 8502ab9cd1cSSteven Whitehouse } 8512ab9cd1cSSteven Whitehouse 8522ab9cd1cSSteven Whitehouse /** 8536d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8542ab9cd1cSSteven Whitehouse * @dir: The directory inode 8552ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8566d4ade98SSteven Whitehouse * @file: File to be opened 8572ab9cd1cSSteven Whitehouse * 8582ab9cd1cSSteven Whitehouse * 8592ab9cd1cSSteven Whitehouse * Returns: errno 8602ab9cd1cSSteven Whitehouse */ 8612ab9cd1cSSteven Whitehouse 8626d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 863b452a458SAl Viro struct file *file) 8642ab9cd1cSSteven Whitehouse { 8656d4ade98SSteven Whitehouse struct inode *inode; 8666d4ade98SSteven Whitehouse struct dentry *d; 8672ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8686d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8692ab9cd1cSSteven Whitehouse int error; 8706d4ade98SSteven Whitehouse 8716d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8727b7a9115SBenjamin Coddington if (inode == NULL) { 8737b7a9115SBenjamin Coddington d_add(dentry, NULL); 8746d4ade98SSteven Whitehouse return NULL; 8757b7a9115SBenjamin Coddington } 8766d4ade98SSteven Whitehouse if (IS_ERR(inode)) 8776d4ade98SSteven Whitehouse return ERR_CAST(inode); 8786d4ade98SSteven Whitehouse 8796d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 8802ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8812ab9cd1cSSteven Whitehouse if (error) { 8822ab9cd1cSSteven Whitehouse iput(inode); 8832ab9cd1cSSteven Whitehouse return ERR_PTR(error); 8842ab9cd1cSSteven Whitehouse } 8856d4ade98SSteven Whitehouse 8866d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 887d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 888d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 889d57b9c9aSJ. Bruce Fields return d; 890d57b9c9aSJ. Bruce Fields } 8916d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 892be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 8936d4ade98SSteven Whitehouse 8942ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 8955ca1db41SMiklos Szeredi if (error) { 8965ca1db41SMiklos Szeredi dput(d); 8976d4ade98SSteven Whitehouse return ERR_PTR(error); 8985ca1db41SMiklos Szeredi } 8996d4ade98SSteven Whitehouse return d; 9002ab9cd1cSSteven Whitehouse } 9016d4ade98SSteven Whitehouse 9026d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 9036d4ade98SSteven Whitehouse unsigned flags) 9046d4ade98SSteven Whitehouse { 905b452a458SAl Viro return __gfs2_lookup(dir, dentry, NULL); 9062ab9cd1cSSteven Whitehouse } 9072ab9cd1cSSteven Whitehouse 9082ab9cd1cSSteven Whitehouse /** 9092ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 9102ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 9112ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 9122ab9cd1cSSteven Whitehouse * @dentry: The name of the link 9132ab9cd1cSSteven Whitehouse * 9142ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 9152ab9cd1cSSteven Whitehouse * name in "dentry". 9162ab9cd1cSSteven Whitehouse * 9172ab9cd1cSSteven Whitehouse * Returns: errno 9182ab9cd1cSSteven Whitehouse */ 9192ab9cd1cSSteven Whitehouse 9202ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 9212ab9cd1cSSteven Whitehouse struct dentry *dentry) 9222ab9cd1cSSteven Whitehouse { 9232ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9242ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9252b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 9262ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9272ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 9282ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 92919aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 9302ab9cd1cSSteven Whitehouse int error; 9312ab9cd1cSSteven Whitehouse 9322ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9332ab9cd1cSSteven Whitehouse return -EPERM; 9342ab9cd1cSSteven Whitehouse 9352fba46a0SBob Peterson error = gfs2_qa_get(dip); 9360a305e49SBob Peterson if (error) 9370a305e49SBob Peterson return error; 9380a305e49SBob Peterson 9392ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 9402ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 9412ab9cd1cSSteven Whitehouse 9422ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 9432ab9cd1cSSteven Whitehouse if (error) 9442ab9cd1cSSteven Whitehouse goto out_parent; 9452ab9cd1cSSteven Whitehouse 9462ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 9472ab9cd1cSSteven Whitehouse if (error) 9482ab9cd1cSSteven Whitehouse goto out_child; 9492ab9cd1cSSteven Whitehouse 9502ab9cd1cSSteven Whitehouse error = -ENOENT; 9512ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9522ab9cd1cSSteven Whitehouse goto out_gunlock; 9532ab9cd1cSSteven Whitehouse 95410556cb2SAl Viro error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 9552ab9cd1cSSteven Whitehouse if (error) 9562ab9cd1cSSteven Whitehouse goto out_gunlock; 9572ab9cd1cSSteven Whitehouse 9582ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9592ab9cd1cSSteven Whitehouse switch (error) { 9602ab9cd1cSSteven Whitehouse case -ENOENT: 9612ab9cd1cSSteven Whitehouse break; 9622ab9cd1cSSteven Whitehouse case 0: 9632ab9cd1cSSteven Whitehouse error = -EEXIST; 9642ab9cd1cSSteven Whitehouse default: 9652ab9cd1cSSteven Whitehouse goto out_gunlock; 9662ab9cd1cSSteven Whitehouse } 9672ab9cd1cSSteven Whitehouse 9682ab9cd1cSSteven Whitehouse error = -EINVAL; 9692ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9702ab9cd1cSSteven Whitehouse goto out_gunlock; 9712ab9cd1cSSteven Whitehouse error = -EFBIG; 9722ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9732ab9cd1cSSteven Whitehouse goto out_gunlock; 9742ab9cd1cSSteven Whitehouse error = -EPERM; 9752ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 9762ab9cd1cSSteven Whitehouse goto out_gunlock; 9772ab9cd1cSSteven Whitehouse error = -EINVAL; 9782ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 9792ab9cd1cSSteven Whitehouse goto out_gunlock; 9802ab9cd1cSSteven Whitehouse error = -EMLINK; 9812ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 9822ab9cd1cSSteven Whitehouse goto out_gunlock; 9832ab9cd1cSSteven Whitehouse 9843c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 9852ab9cd1cSSteven Whitehouse if (error < 0) 9862ab9cd1cSSteven Whitehouse goto out_gunlock; 9872ab9cd1cSSteven Whitehouse 9883c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 9893c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 990b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 9912ab9cd1cSSteven Whitehouse if (error) 9925407e242SBob Peterson goto out_gunlock; 9932ab9cd1cSSteven Whitehouse 9947b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 9952ab9cd1cSSteven Whitehouse if (error) 9962ab9cd1cSSteven Whitehouse goto out_gunlock_q; 9972ab9cd1cSSteven Whitehouse 998534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 9992ab9cd1cSSteven Whitehouse if (error) 10002ab9cd1cSSteven Whitehouse goto out_ipres; 10012ab9cd1cSSteven Whitehouse } else { 10022ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 10032ab9cd1cSSteven Whitehouse if (error) 10042ab9cd1cSSteven Whitehouse goto out_ipres; 10052ab9cd1cSSteven Whitehouse } 10062ab9cd1cSSteven Whitehouse 10072ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 10082ab9cd1cSSteven Whitehouse if (error) 10092ab9cd1cSSteven Whitehouse goto out_end_trans; 10102ab9cd1cSSteven Whitehouse 10112b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 10122ab9cd1cSSteven Whitehouse if (error) 10132ab9cd1cSSteven Whitehouse goto out_brelse; 10142ab9cd1cSSteven Whitehouse 1015350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 10162ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 1017078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 1018ab9bbda0SSteven Whitehouse ihold(inode); 1019ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 1020ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 10212ab9cd1cSSteven Whitehouse 10222ab9cd1cSSteven Whitehouse out_brelse: 10232ab9cd1cSSteven Whitehouse brelse(dibh); 10242ab9cd1cSSteven Whitehouse out_end_trans: 10252ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10262ab9cd1cSSteven Whitehouse out_ipres: 10273c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10282ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10292ab9cd1cSSteven Whitehouse out_gunlock_q: 10303c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10312ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10322ab9cd1cSSteven Whitehouse out_gunlock: 10332b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 10342ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10352ab9cd1cSSteven Whitehouse out_child: 10362ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10372ab9cd1cSSteven Whitehouse out_parent: 10382297ab61SBob Peterson gfs2_qa_put(dip); 10392ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10402ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10412ab9cd1cSSteven Whitehouse return error; 10422ab9cd1cSSteven Whitehouse } 10432ab9cd1cSSteven Whitehouse 10442ab9cd1cSSteven Whitehouse /* 10452ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10462ab9cd1cSSteven Whitehouse * @dip: the directory 10472ab9cd1cSSteven Whitehouse * @name: the name of the file 10482ab9cd1cSSteven Whitehouse * @ip: the inode 10492ab9cd1cSSteven Whitehouse * 10502ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10512ab9cd1cSSteven Whitehouse * 10522ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10532ab9cd1cSSteven Whitehouse */ 10542ab9cd1cSSteven Whitehouse 10552ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10562ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10572ab9cd1cSSteven Whitehouse { 10582ab9cd1cSSteven Whitehouse int error; 10592ab9cd1cSSteven Whitehouse 10602ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10612ab9cd1cSSteven Whitehouse return -EPERM; 10622ab9cd1cSSteven Whitehouse 10632ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10646b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10656b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10662ab9cd1cSSteven Whitehouse return -EPERM; 10672ab9cd1cSSteven Whitehouse 10682ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10692ab9cd1cSSteven Whitehouse return -EPERM; 10702ab9cd1cSSteven Whitehouse 107110556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 10722ab9cd1cSSteven Whitehouse if (error) 10732ab9cd1cSSteven Whitehouse return error; 10742ab9cd1cSSteven Whitehouse 107537975f15SFabian Frederick return gfs2_dir_check(&dip->i_inode, name, ip); 10762ab9cd1cSSteven Whitehouse } 10772ab9cd1cSSteven Whitehouse 10782ab9cd1cSSteven Whitehouse /** 10792ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10802ab9cd1cSSteven Whitehouse * @dip: The parent directory 10812ab9cd1cSSteven Whitehouse * @name: The name of the entry in the parent directory 10822ab9cd1cSSteven Whitehouse * @inode: The inode to be removed 10832ab9cd1cSSteven Whitehouse * 10842ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 10852ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 10862ab9cd1cSSteven Whitehouse * 10872ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10882ab9cd1cSSteven Whitehouse */ 10892ab9cd1cSSteven Whitehouse 10902ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 10914327a9bfSBob Peterson const struct dentry *dentry) 10922ab9cd1cSSteven Whitehouse { 10932b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 10942ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10952ab9cd1cSSteven Whitehouse int error; 10962ab9cd1cSSteven Whitehouse 10972ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 10982ab9cd1cSSteven Whitehouse if (error) 10992ab9cd1cSSteven Whitehouse return error; 11002ab9cd1cSSteven Whitehouse 11012ab9cd1cSSteven Whitehouse ip->i_entries = 0; 1102078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 11032ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 11042ab9cd1cSSteven Whitehouse clear_nlink(inode); 11052ab9cd1cSSteven Whitehouse else 11062ab9cd1cSSteven Whitehouse drop_nlink(inode); 11072ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 11082ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11092ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 11102ab9cd1cSSteven Whitehouse return 0; 11112ab9cd1cSSteven Whitehouse } 11122ab9cd1cSSteven Whitehouse 11132ab9cd1cSSteven Whitehouse 11142ab9cd1cSSteven Whitehouse /** 11152ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 11162ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 11172ab9cd1cSSteven Whitehouse * @dentry: The file itself 11182ab9cd1cSSteven Whitehouse * 11192ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 11202ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 11212ab9cd1cSSteven Whitehouse * 11222ab9cd1cSSteven Whitehouse * Returns: errno 11232ab9cd1cSSteven Whitehouse */ 11242ab9cd1cSSteven Whitehouse 11252ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11262ab9cd1cSSteven Whitehouse { 11272ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11282ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11292b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11302ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11312ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 11322ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11335e2f7d61SBob Peterson int error; 11345e2f7d61SBob Peterson 11355e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11365e2f7d61SBob Peterson if (error) 11375e2f7d61SBob Peterson return error; 11385e2f7d61SBob Peterson 11395e2f7d61SBob Peterson error = -EROFS; 11402ab9cd1cSSteven Whitehouse 11412ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 11422ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 11432ab9cd1cSSteven Whitehouse 114466fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1145a365fbf3SSteven Whitehouse if (!rgd) 114687654896SSteven Whitehouse goto out_inodes; 1147a365fbf3SSteven Whitehouse 11482ab9cd1cSSteven Whitehouse gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 11492ab9cd1cSSteven Whitehouse 11502ab9cd1cSSteven Whitehouse 11512ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 11522ab9cd1cSSteven Whitehouse if (error) 11532ab9cd1cSSteven Whitehouse goto out_parent; 11542ab9cd1cSSteven Whitehouse 11552ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 11562ab9cd1cSSteven Whitehouse if (error) 11572ab9cd1cSSteven Whitehouse goto out_child; 11582ab9cd1cSSteven Whitehouse 11592ab9cd1cSSteven Whitehouse error = -ENOENT; 11602ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11612ab9cd1cSSteven Whitehouse goto out_rgrp; 11622ab9cd1cSSteven Whitehouse 11632ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11642ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11652ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11662ab9cd1cSSteven Whitehouse goto out_rgrp; 11672ab9cd1cSSteven Whitehouse } 11682ab9cd1cSSteven Whitehouse 11692ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 11702ab9cd1cSSteven Whitehouse if (error) 11712ab9cd1cSSteven Whitehouse goto out_rgrp; 11722ab9cd1cSSteven Whitehouse 11732ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11742ab9cd1cSSteven Whitehouse if (error) 11752ab9cd1cSSteven Whitehouse goto out_gunlock; 11762ab9cd1cSSteven Whitehouse 11772ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 11782ab9cd1cSSteven Whitehouse if (error) 11792eb5909dSBob Peterson goto out_gunlock; 11802ab9cd1cSSteven Whitehouse 11814327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 11822ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11832eb5909dSBob Peterson 11842ab9cd1cSSteven Whitehouse out_gunlock: 11852ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11862ab9cd1cSSteven Whitehouse out_rgrp: 11872ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11882ab9cd1cSSteven Whitehouse out_child: 11892ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 11902ab9cd1cSSteven Whitehouse out_parent: 119187654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 119287654896SSteven Whitehouse out_inodes: 119387654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 11942ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 11952ab9cd1cSSteven Whitehouse return error; 11962ab9cd1cSSteven Whitehouse } 11972ab9cd1cSSteven Whitehouse 11982ab9cd1cSSteven Whitehouse /** 11992ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 12002ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 12012ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 12022ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 12032ab9cd1cSSteven Whitehouse * 12042ab9cd1cSSteven Whitehouse * Returns: errno 12052ab9cd1cSSteven Whitehouse */ 12062ab9cd1cSSteven Whitehouse 12072ab9cd1cSSteven Whitehouse static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 12082ab9cd1cSSteven Whitehouse const char *symname) 12092ab9cd1cSSteven Whitehouse { 1210160b4026SSteven Whitehouse unsigned int size; 12112ab9cd1cSSteven Whitehouse 12122ab9cd1cSSteven Whitehouse size = strlen(symname); 1213235628c5SAndreas Gruenbacher if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 12142ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 12152ab9cd1cSSteven Whitehouse 1216b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 12172ab9cd1cSSteven Whitehouse } 12182ab9cd1cSSteven Whitehouse 12192ab9cd1cSSteven Whitehouse /** 12202ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 12212ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12222ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12232ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12242ab9cd1cSSteven Whitehouse * 12252ab9cd1cSSteven Whitehouse * Returns: errno 12262ab9cd1cSSteven Whitehouse */ 12272ab9cd1cSSteven Whitehouse 122818bb1db3SAl Viro static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 12292ab9cd1cSSteven Whitehouse { 1230235628c5SAndreas Gruenbacher unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1231b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 12322ab9cd1cSSteven Whitehouse } 12332ab9cd1cSSteven Whitehouse 12342ab9cd1cSSteven Whitehouse /** 12352ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 12362ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12372ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12382ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1239f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12402ab9cd1cSSteven Whitehouse * 12412ab9cd1cSSteven Whitehouse */ 12422ab9cd1cSSteven Whitehouse 12431a67aafbSAl Viro static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 12442ab9cd1cSSteven Whitehouse dev_t dev) 12452ab9cd1cSSteven Whitehouse { 1246b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 12476d4ade98SSteven Whitehouse } 12486d4ade98SSteven Whitehouse 12496d4ade98SSteven Whitehouse /** 12506d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12516d4ade98SSteven Whitehouse * @dir: The directory 12526d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12536d4ade98SSteven Whitehouse * @file: The proposed new struct file 12546d4ade98SSteven Whitehouse * @flags: open flags 12556d4ade98SSteven Whitehouse * @mode: File mode 12566d4ade98SSteven Whitehouse * 12576d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12586d4ade98SSteven Whitehouse */ 12596d4ade98SSteven Whitehouse 12606d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12616d4ade98SSteven Whitehouse struct file *file, unsigned flags, 126244907d79SAl Viro umode_t mode) 12636d4ade98SSteven Whitehouse { 12646d4ade98SSteven Whitehouse struct dentry *d; 12656d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12666d4ade98SSteven Whitehouse 126700699ad8SAl Viro if (!d_in_lookup(dentry)) 12684d93bc3eSAl Viro goto skip_lookup; 12694d93bc3eSAl Viro 1270b452a458SAl Viro d = __gfs2_lookup(dir, dentry, file); 12716d4ade98SSteven Whitehouse if (IS_ERR(d)) 12726d4ade98SSteven Whitehouse return PTR_ERR(d); 12735ca1db41SMiklos Szeredi if (d != NULL) 12745ca1db41SMiklos Szeredi dentry = d; 12752b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1276aad888f8SAl Viro if (!(file->f_mode & FMODE_OPENED)) 1277ec7d879cSAl Viro return finish_no_open(file, d); 12785ca1db41SMiklos Szeredi dput(d); 127921039132SAl Viro return excl && (flags & O_CREAT) ? -EEXIST : 0; 12806d4ade98SSteven Whitehouse } 12816d4ade98SSteven Whitehouse 12825ca1db41SMiklos Szeredi BUG_ON(d != NULL); 12834d93bc3eSAl Viro 12844d93bc3eSAl Viro skip_lookup: 12856d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 12866d4ade98SSteven Whitehouse return -ENOENT; 12876d4ade98SSteven Whitehouse 1288b452a458SAl Viro return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 12892ab9cd1cSSteven Whitehouse } 12902ab9cd1cSSteven Whitehouse 12912ab9cd1cSSteven Whitehouse /* 12922ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 12932ab9cd1cSSteven Whitehouse * @this: move this 12942ab9cd1cSSteven Whitehouse * @to: to here 12952ab9cd1cSSteven Whitehouse * 12962ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 12972ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 12982ab9cd1cSSteven Whitehouse * 12992ab9cd1cSSteven Whitehouse * Returns: errno 13002ab9cd1cSSteven Whitehouse */ 13012ab9cd1cSSteven Whitehouse 13022ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 13032ab9cd1cSSteven Whitehouse { 13042ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 13052ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 13062ab9cd1cSSteven Whitehouse struct inode *tmp; 13072ab9cd1cSSteven Whitehouse int error = 0; 13082ab9cd1cSSteven Whitehouse 13092ab9cd1cSSteven Whitehouse igrab(dir); 13102ab9cd1cSSteven Whitehouse 13112ab9cd1cSSteven Whitehouse for (;;) { 13122ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 13132ab9cd1cSSteven Whitehouse error = -EINVAL; 13142ab9cd1cSSteven Whitehouse break; 13152ab9cd1cSSteven Whitehouse } 13162b0143b5SDavid Howells if (dir == d_inode(sb->s_root)) { 13172ab9cd1cSSteven Whitehouse error = 0; 13182ab9cd1cSSteven Whitehouse break; 13192ab9cd1cSSteven Whitehouse } 13202ab9cd1cSSteven Whitehouse 13212ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 132248f8f711SAbhi Das if (!tmp) { 132348f8f711SAbhi Das error = -ENOENT; 132448f8f711SAbhi Das break; 132548f8f711SAbhi Das } 13262ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13272ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13282ab9cd1cSSteven Whitehouse break; 13292ab9cd1cSSteven Whitehouse } 13302ab9cd1cSSteven Whitehouse 13312ab9cd1cSSteven Whitehouse iput(dir); 13322ab9cd1cSSteven Whitehouse dir = tmp; 13332ab9cd1cSSteven Whitehouse } 13342ab9cd1cSSteven Whitehouse 13352ab9cd1cSSteven Whitehouse iput(dir); 13362ab9cd1cSSteven Whitehouse 13372ab9cd1cSSteven Whitehouse return error; 13382ab9cd1cSSteven Whitehouse } 13392ab9cd1cSSteven Whitehouse 13402ab9cd1cSSteven Whitehouse /** 1341a63b7bbcSBenjamin Marzinski * update_moved_ino - Update an inode that's being moved 1342a63b7bbcSBenjamin Marzinski * @ip: The inode being moved 1343a63b7bbcSBenjamin Marzinski * @ndip: The parent directory of the new filename 1344a63b7bbcSBenjamin Marzinski * @dir_rename: True of ip is a directory 1345a63b7bbcSBenjamin Marzinski * 1346a63b7bbcSBenjamin Marzinski * Returns: errno 1347a63b7bbcSBenjamin Marzinski */ 1348a63b7bbcSBenjamin Marzinski 1349a63b7bbcSBenjamin Marzinski static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1350a63b7bbcSBenjamin Marzinski int dir_rename) 1351a63b7bbcSBenjamin Marzinski { 1352a63b7bbcSBenjamin Marzinski if (dir_rename) 1353a63b7bbcSBenjamin Marzinski return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1354a63b7bbcSBenjamin Marzinski 1355078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 135683998ccdSAndreas Gruenbacher mark_inode_dirty_sync(&ip->i_inode); 1357a63b7bbcSBenjamin Marzinski return 0; 1358a63b7bbcSBenjamin Marzinski } 1359a63b7bbcSBenjamin Marzinski 1360a63b7bbcSBenjamin Marzinski 1361a63b7bbcSBenjamin Marzinski /** 13622ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13632ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13642ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13652ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13662ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13672ab9cd1cSSteven Whitehouse * 13682ab9cd1cSSteven Whitehouse * Returns: errno 13692ab9cd1cSSteven Whitehouse */ 13702ab9cd1cSSteven Whitehouse 13712ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13722ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13732ab9cd1cSSteven Whitehouse { 13742ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 13752ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 13762b0143b5SDavid Howells struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 13772ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 13782ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 1379bc74aaefSBob Peterson struct gfs2_holder ghs[4], r_gh, rd_gh; 13802ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 13812ab9cd1cSSteven Whitehouse unsigned int num_gh; 13822ab9cd1cSSteven Whitehouse int dir_rename = 0; 138319aeb5a6SBob Peterson struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 13842ab9cd1cSSteven Whitehouse unsigned int x; 13852ab9cd1cSSteven Whitehouse int error; 13862ab9cd1cSSteven Whitehouse 13876df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1388bc74aaefSBob Peterson gfs2_holder_mark_uninitialized(&rd_gh); 13892b0143b5SDavid Howells if (d_really_is_positive(ndentry)) { 13902b0143b5SDavid Howells nip = GFS2_I(d_inode(ndentry)); 13912ab9cd1cSSteven Whitehouse if (ip == nip) 13922ab9cd1cSSteven Whitehouse return 0; 13932ab9cd1cSSteven Whitehouse } 13942ab9cd1cSSteven Whitehouse 13955e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 13965e2f7d61SBob Peterson if (error) 13975e2f7d61SBob Peterson return error; 13985e2f7d61SBob Peterson 13992fba46a0SBob Peterson error = gfs2_qa_get(ndip); 14000a305e49SBob Peterson if (error) 14010a305e49SBob Peterson return error; 14020a305e49SBob Peterson 14032ab9cd1cSSteven Whitehouse if (odip != ndip) { 14042ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 14052ab9cd1cSSteven Whitehouse 0, &r_gh); 14062ab9cd1cSSteven Whitehouse if (error) 14072ab9cd1cSSteven Whitehouse goto out; 14082ab9cd1cSSteven Whitehouse 14092ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 14102ab9cd1cSSteven Whitehouse dir_rename = 1; 1411a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 14122ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 14132ab9cd1cSSteven Whitehouse if (error) 14142ab9cd1cSSteven Whitehouse goto out_gunlock_r; 14152ab9cd1cSSteven Whitehouse } 14162ab9cd1cSSteven Whitehouse } 14172ab9cd1cSSteven Whitehouse 14182ab9cd1cSSteven Whitehouse num_gh = 1; 1419ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 14202ab9cd1cSSteven Whitehouse if (odip != ndip) { 1421ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1422ad26967bSBob Peterson ghs + num_gh); 14232ab9cd1cSSteven Whitehouse num_gh++; 14242ab9cd1cSSteven Whitehouse } 1425ad26967bSBob Peterson gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 14262ab9cd1cSSteven Whitehouse num_gh++; 14272ab9cd1cSSteven Whitehouse 14282ab9cd1cSSteven Whitehouse if (nip) { 1429ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1430ad26967bSBob Peterson ghs + num_gh); 14312ab9cd1cSSteven Whitehouse num_gh++; 14322ab9cd1cSSteven Whitehouse } 14332ab9cd1cSSteven Whitehouse 14342ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 14352ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 14362ab9cd1cSSteven Whitehouse if (error) 14372ab9cd1cSSteven Whitehouse goto out_gunlock; 14382ab9cd1cSSteven Whitehouse } 1439ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1440ad26967bSBob Peterson if (error) 1441ad26967bSBob Peterson goto out_gunlock; 14422ab9cd1cSSteven Whitehouse 1443bc74aaefSBob Peterson if (nip) { 1444bc74aaefSBob Peterson /* Grab the resource group glock for unlink flag twiddling. 1445bc74aaefSBob Peterson * This is the case where the target dinode already exists 1446bc74aaefSBob Peterson * so we unlink before doing the rename. 1447bc74aaefSBob Peterson */ 1448bc74aaefSBob Peterson nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1449bc74aaefSBob Peterson if (!nrgd) { 1450bc74aaefSBob Peterson error = -ENOENT; 1451bc74aaefSBob Peterson goto out_gunlock; 1452bc74aaefSBob Peterson } 1453bc74aaefSBob Peterson error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, 1454bc74aaefSBob Peterson &rd_gh); 1455bc74aaefSBob Peterson if (error) 1456bc74aaefSBob Peterson goto out_gunlock; 1457bc74aaefSBob Peterson } 1458bc74aaefSBob Peterson 14592ab9cd1cSSteven Whitehouse error = -ENOENT; 14602ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14612ab9cd1cSSteven Whitehouse goto out_gunlock; 14622ab9cd1cSSteven Whitehouse 14632ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14642ab9cd1cSSteven Whitehouse 14652ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14662ab9cd1cSSteven Whitehouse if (error) 14672ab9cd1cSSteven Whitehouse goto out_gunlock; 14682ab9cd1cSSteven Whitehouse 14692ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14702ab9cd1cSSteven Whitehouse 14712ab9cd1cSSteven Whitehouse if (nip) { 14722ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14732ab9cd1cSSteven Whitehouse if (error) 14742ab9cd1cSSteven Whitehouse goto out_gunlock; 14752ab9cd1cSSteven Whitehouse 14762ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 14772ab9cd1cSSteven Whitehouse error = -EAGAIN; 14782ab9cd1cSSteven Whitehouse goto out_gunlock; 14792ab9cd1cSSteven Whitehouse } 14802ab9cd1cSSteven Whitehouse 14812ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 14822ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 14832ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 14842ab9cd1cSSteven Whitehouse error = -EIO; 14852ab9cd1cSSteven Whitehouse goto out_gunlock; 14862ab9cd1cSSteven Whitehouse } 14872ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 14882ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 14892ab9cd1cSSteven Whitehouse goto out_gunlock; 14902ab9cd1cSSteven Whitehouse } 14912ab9cd1cSSteven Whitehouse } 14922ab9cd1cSSteven Whitehouse } else { 149310556cb2SAl Viro error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 14942ab9cd1cSSteven Whitehouse if (error) 14952ab9cd1cSSteven Whitehouse goto out_gunlock; 14962ab9cd1cSSteven Whitehouse 14972ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 14982ab9cd1cSSteven Whitehouse switch (error) { 14992ab9cd1cSSteven Whitehouse case -ENOENT: 15002ab9cd1cSSteven Whitehouse error = 0; 15012ab9cd1cSSteven Whitehouse break; 15022ab9cd1cSSteven Whitehouse case 0: 15032ab9cd1cSSteven Whitehouse error = -EEXIST; 15042ab9cd1cSSteven Whitehouse default: 15052ab9cd1cSSteven Whitehouse goto out_gunlock; 1506098b9c14SAliasgar Surti } 15072ab9cd1cSSteven Whitehouse 15082ab9cd1cSSteven Whitehouse if (odip != ndip) { 15092ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 15102ab9cd1cSSteven Whitehouse error = -ENOENT; 15112ab9cd1cSSteven Whitehouse goto out_gunlock; 15122ab9cd1cSSteven Whitehouse } 15132ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 15142ab9cd1cSSteven Whitehouse error = -EFBIG; 15152ab9cd1cSSteven Whitehouse goto out_gunlock; 15162ab9cd1cSSteven Whitehouse } 15172ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 15182ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 15192ab9cd1cSSteven Whitehouse error = -EMLINK; 15202ab9cd1cSSteven Whitehouse goto out_gunlock; 15212ab9cd1cSSteven Whitehouse } 15222ab9cd1cSSteven Whitehouse } 15232ab9cd1cSSteven Whitehouse } 15242ab9cd1cSSteven Whitehouse 15252ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 15262ab9cd1cSSteven Whitehouse 15272ab9cd1cSSteven Whitehouse if (dir_rename) { 15282b0143b5SDavid Howells error = gfs2_permission(d_inode(odentry), MAY_WRITE); 15292ab9cd1cSSteven Whitehouse if (error) 15302ab9cd1cSSteven Whitehouse goto out_gunlock; 15312ab9cd1cSSteven Whitehouse } 15322ab9cd1cSSteven Whitehouse 15333c1c0ae1SSteven Whitehouse if (nip == NULL) { 15343c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 15353c1c0ae1SSteven Whitehouse if (error) 15362ab9cd1cSSteven Whitehouse goto out_gunlock; 15373c1c0ae1SSteven Whitehouse } 15382ab9cd1cSSteven Whitehouse 15393c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 15403c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1541b8fbf471SAbhi Das error = gfs2_quota_lock_check(ndip, &ap); 15422ab9cd1cSSteven Whitehouse if (error) 15435407e242SBob Peterson goto out_gunlock; 15442ab9cd1cSSteven Whitehouse 15457b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 15462ab9cd1cSSteven Whitehouse if (error) 15472ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15482ab9cd1cSSteven Whitehouse 1549534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1550534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 15512ab9cd1cSSteven Whitehouse if (error) 15522ab9cd1cSSteven Whitehouse goto out_ipreserv; 15532ab9cd1cSSteven Whitehouse } else { 15542ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 15552ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 15562ab9cd1cSSteven Whitehouse if (error) 15572ab9cd1cSSteven Whitehouse goto out_gunlock; 15582ab9cd1cSSteven Whitehouse } 15592ab9cd1cSSteven Whitehouse 15602ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15612ab9cd1cSSteven Whitehouse 15624327a9bfSBob Peterson if (nip) 15634327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15642ab9cd1cSSteven Whitehouse 1565a63b7bbcSBenjamin Marzinski error = update_moved_ino(ip, ndip, dir_rename); 15662ab9cd1cSSteven Whitehouse if (error) 15672ab9cd1cSSteven Whitehouse goto out_end_trans; 15682ab9cd1cSSteven Whitehouse 15692ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15702ab9cd1cSSteven Whitehouse if (error) 15712ab9cd1cSSteven Whitehouse goto out_end_trans; 15722ab9cd1cSSteven Whitehouse 15732b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 15742ab9cd1cSSteven Whitehouse if (error) 15752ab9cd1cSSteven Whitehouse goto out_end_trans; 15762ab9cd1cSSteven Whitehouse 15772ab9cd1cSSteven Whitehouse out_end_trans: 15782ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 15792ab9cd1cSSteven Whitehouse out_ipreserv: 15803c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15812ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 15822ab9cd1cSSteven Whitehouse out_gunlock_q: 15833c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15842ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 15852ab9cd1cSSteven Whitehouse out_gunlock: 15862b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1587bc74aaefSBob Peterson if (gfs2_holder_initialized(&rd_gh)) 1588bc74aaefSBob Peterson gfs2_glock_dq_uninit(&rd_gh); 1589bc74aaefSBob Peterson 15902ab9cd1cSSteven Whitehouse while (x--) { 1591ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 15922ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 15932ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 15942ab9cd1cSSteven Whitehouse } 15952ab9cd1cSSteven Whitehouse out_gunlock_r: 15966df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 15972ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 15982ab9cd1cSSteven Whitehouse out: 15992fba46a0SBob Peterson gfs2_qa_put(ndip); 16002ab9cd1cSSteven Whitehouse return error; 16012ab9cd1cSSteven Whitehouse } 16022ab9cd1cSSteven Whitehouse 16032ab9cd1cSSteven Whitehouse /** 1604a63b7bbcSBenjamin Marzinski * gfs2_exchange - exchange two files 1605a63b7bbcSBenjamin Marzinski * @odir: Parent directory of old file name 1606a63b7bbcSBenjamin Marzinski * @odentry: The old dentry of the file 1607a63b7bbcSBenjamin Marzinski * @ndir: Parent directory of new file name 1608a63b7bbcSBenjamin Marzinski * @ndentry: The new dentry of the file 1609a63b7bbcSBenjamin Marzinski * @flags: The rename flags 1610a63b7bbcSBenjamin Marzinski * 1611a63b7bbcSBenjamin Marzinski * Returns: errno 1612a63b7bbcSBenjamin Marzinski */ 1613a63b7bbcSBenjamin Marzinski 1614a63b7bbcSBenjamin Marzinski static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1615a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1616a63b7bbcSBenjamin Marzinski unsigned int flags) 1617a63b7bbcSBenjamin Marzinski { 1618a63b7bbcSBenjamin Marzinski struct gfs2_inode *odip = GFS2_I(odir); 1619a63b7bbcSBenjamin Marzinski struct gfs2_inode *ndip = GFS2_I(ndir); 1620a63b7bbcSBenjamin Marzinski struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1621a63b7bbcSBenjamin Marzinski struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1622a63b7bbcSBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(odir); 1623ad26967bSBob Peterson struct gfs2_holder ghs[4], r_gh; 1624a63b7bbcSBenjamin Marzinski unsigned int num_gh; 1625a63b7bbcSBenjamin Marzinski unsigned int x; 1626a63b7bbcSBenjamin Marzinski umode_t old_mode = oip->i_inode.i_mode; 1627a63b7bbcSBenjamin Marzinski umode_t new_mode = nip->i_inode.i_mode; 1628a63b7bbcSBenjamin Marzinski int error; 1629a63b7bbcSBenjamin Marzinski 16306df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1631a63b7bbcSBenjamin Marzinski error = gfs2_rindex_update(sdp); 1632a63b7bbcSBenjamin Marzinski if (error) 1633a63b7bbcSBenjamin Marzinski return error; 1634a63b7bbcSBenjamin Marzinski 1635a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1636a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1637a63b7bbcSBenjamin Marzinski 0, &r_gh); 1638a63b7bbcSBenjamin Marzinski if (error) 1639a63b7bbcSBenjamin Marzinski goto out; 1640a63b7bbcSBenjamin Marzinski 1641a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1642a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1643a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(oip, ndip); 1644a63b7bbcSBenjamin Marzinski if (error) 1645a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1646a63b7bbcSBenjamin Marzinski } 1647a63b7bbcSBenjamin Marzinski 1648a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1649a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1650a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(nip, odip); 1651a63b7bbcSBenjamin Marzinski if (error) 1652a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1653a63b7bbcSBenjamin Marzinski } 1654a63b7bbcSBenjamin Marzinski } 1655a63b7bbcSBenjamin Marzinski 1656a63b7bbcSBenjamin Marzinski num_gh = 1; 1657ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1658a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1659ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1660ad26967bSBob Peterson ghs + num_gh); 1661a63b7bbcSBenjamin Marzinski num_gh++; 1662a63b7bbcSBenjamin Marzinski } 1663ad26967bSBob Peterson gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1664a63b7bbcSBenjamin Marzinski num_gh++; 1665a63b7bbcSBenjamin Marzinski 1666ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1667a63b7bbcSBenjamin Marzinski num_gh++; 1668a63b7bbcSBenjamin Marzinski 1669a63b7bbcSBenjamin Marzinski for (x = 0; x < num_gh; x++) { 1670a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq(ghs + x); 1671a63b7bbcSBenjamin Marzinski if (error) 1672a63b7bbcSBenjamin Marzinski goto out_gunlock; 1673a63b7bbcSBenjamin Marzinski } 1674a63b7bbcSBenjamin Marzinski 1675ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1676ad26967bSBob Peterson if (error) 1677ad26967bSBob Peterson goto out_gunlock; 1678ad26967bSBob Peterson 1679a63b7bbcSBenjamin Marzinski error = -ENOENT; 1680a63b7bbcSBenjamin Marzinski if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1681a63b7bbcSBenjamin Marzinski goto out_gunlock; 1682a63b7bbcSBenjamin Marzinski 1683a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1684a63b7bbcSBenjamin Marzinski if (error) 1685a63b7bbcSBenjamin Marzinski goto out_gunlock; 1686a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1687a63b7bbcSBenjamin Marzinski if (error) 1688a63b7bbcSBenjamin Marzinski goto out_gunlock; 1689a63b7bbcSBenjamin Marzinski 1690a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1691a63b7bbcSBenjamin Marzinski error = gfs2_permission(odentry->d_inode, MAY_WRITE); 1692a63b7bbcSBenjamin Marzinski if (error) 1693a63b7bbcSBenjamin Marzinski goto out_gunlock; 1694a63b7bbcSBenjamin Marzinski } 1695a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1696a63b7bbcSBenjamin Marzinski error = gfs2_permission(ndentry->d_inode, MAY_WRITE); 1697a63b7bbcSBenjamin Marzinski if (error) 1698a63b7bbcSBenjamin Marzinski goto out_gunlock; 1699a63b7bbcSBenjamin Marzinski } 1700a63b7bbcSBenjamin Marzinski error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1701a63b7bbcSBenjamin Marzinski if (error) 1702a63b7bbcSBenjamin Marzinski goto out_gunlock; 1703a63b7bbcSBenjamin Marzinski 1704a63b7bbcSBenjamin Marzinski error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1705a63b7bbcSBenjamin Marzinski if (error) 1706a63b7bbcSBenjamin Marzinski goto out_end_trans; 1707a63b7bbcSBenjamin Marzinski 1708a63b7bbcSBenjamin Marzinski error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1709a63b7bbcSBenjamin Marzinski if (error) 1710a63b7bbcSBenjamin Marzinski goto out_end_trans; 1711a63b7bbcSBenjamin Marzinski 1712a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1713a63b7bbcSBenjamin Marzinski IF2DT(old_mode)); 1714a63b7bbcSBenjamin Marzinski if (error) 1715a63b7bbcSBenjamin Marzinski goto out_end_trans; 1716a63b7bbcSBenjamin Marzinski 1717a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1718a63b7bbcSBenjamin Marzinski IF2DT(new_mode)); 1719a63b7bbcSBenjamin Marzinski if (error) 1720a63b7bbcSBenjamin Marzinski goto out_end_trans; 1721a63b7bbcSBenjamin Marzinski 1722a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1723a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1724a63b7bbcSBenjamin Marzinski inc_nlink(&odip->i_inode); 1725a63b7bbcSBenjamin Marzinski drop_nlink(&ndip->i_inode); 1726a63b7bbcSBenjamin Marzinski } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1727a63b7bbcSBenjamin Marzinski inc_nlink(&ndip->i_inode); 1728a63b7bbcSBenjamin Marzinski drop_nlink(&odip->i_inode); 1729a63b7bbcSBenjamin Marzinski } 1730a63b7bbcSBenjamin Marzinski } 1731a63b7bbcSBenjamin Marzinski mark_inode_dirty(&ndip->i_inode); 1732a63b7bbcSBenjamin Marzinski if (odip != ndip) 1733a63b7bbcSBenjamin Marzinski mark_inode_dirty(&odip->i_inode); 1734a63b7bbcSBenjamin Marzinski 1735a63b7bbcSBenjamin Marzinski out_end_trans: 1736a63b7bbcSBenjamin Marzinski gfs2_trans_end(sdp); 1737a63b7bbcSBenjamin Marzinski out_gunlock: 1738a63b7bbcSBenjamin Marzinski while (x--) { 1739ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 1740a63b7bbcSBenjamin Marzinski gfs2_glock_dq(ghs + x); 1741a63b7bbcSBenjamin Marzinski gfs2_holder_uninit(ghs + x); 1742a63b7bbcSBenjamin Marzinski } 1743a63b7bbcSBenjamin Marzinski out_gunlock_r: 17446df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 1745a63b7bbcSBenjamin Marzinski gfs2_glock_dq_uninit(&r_gh); 1746a63b7bbcSBenjamin Marzinski out: 1747a63b7bbcSBenjamin Marzinski return error; 1748a63b7bbcSBenjamin Marzinski } 1749a63b7bbcSBenjamin Marzinski 1750a63b7bbcSBenjamin Marzinski static int gfs2_rename2(struct inode *odir, struct dentry *odentry, 1751a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1752a63b7bbcSBenjamin Marzinski unsigned int flags) 1753a63b7bbcSBenjamin Marzinski { 1754a63b7bbcSBenjamin Marzinski flags &= ~RENAME_NOREPLACE; 1755a63b7bbcSBenjamin Marzinski 1756a63b7bbcSBenjamin Marzinski if (flags & ~RENAME_EXCHANGE) 1757a63b7bbcSBenjamin Marzinski return -EINVAL; 1758a63b7bbcSBenjamin Marzinski 1759a63b7bbcSBenjamin Marzinski if (flags & RENAME_EXCHANGE) 1760a63b7bbcSBenjamin Marzinski return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1761a63b7bbcSBenjamin Marzinski 1762a63b7bbcSBenjamin Marzinski return gfs2_rename(odir, odentry, ndir, ndentry); 1763a63b7bbcSBenjamin Marzinski } 1764a63b7bbcSBenjamin Marzinski 1765a63b7bbcSBenjamin Marzinski /** 17666b255391SAl Viro * gfs2_get_link - Follow a symbolic link 17672ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 17686b255391SAl Viro * @inode: The inode of the link 1769fceef393SAl Viro * @done: destructor for return value 17702ab9cd1cSSteven Whitehouse * 17712ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 17722ab9cd1cSSteven Whitehouse * 17732ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 17742ab9cd1cSSteven Whitehouse */ 17752ab9cd1cSSteven Whitehouse 17766b255391SAl Viro static const char *gfs2_get_link(struct dentry *dentry, 1777fceef393SAl Viro struct inode *inode, 1778fceef393SAl Viro struct delayed_call *done) 17792ab9cd1cSSteven Whitehouse { 17806b255391SAl Viro struct gfs2_inode *ip = GFS2_I(inode); 17812ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 17822ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1783160b4026SSteven Whitehouse unsigned int size; 17842ab9cd1cSSteven Whitehouse char *buf; 17852ab9cd1cSSteven Whitehouse int error; 17862ab9cd1cSSteven Whitehouse 17876b255391SAl Viro if (!dentry) 17886b255391SAl Viro return ERR_PTR(-ECHILD); 17896b255391SAl Viro 17902ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 17912ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 17922ab9cd1cSSteven Whitehouse if (error) { 17932ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 1794680baacbSAl Viro return ERR_PTR(error); 17952ab9cd1cSSteven Whitehouse } 17962ab9cd1cSSteven Whitehouse 17972ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 17982ab9cd1cSSteven Whitehouse if (size == 0) { 17992ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 18002ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 18012ab9cd1cSSteven Whitehouse goto out; 18022ab9cd1cSSteven Whitehouse } 18032ab9cd1cSSteven Whitehouse 18042ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 18052ab9cd1cSSteven Whitehouse if (error) { 18062ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 18072ab9cd1cSSteven Whitehouse goto out; 18082ab9cd1cSSteven Whitehouse } 18092ab9cd1cSSteven Whitehouse 1810160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 18112ab9cd1cSSteven Whitehouse if (!buf) 18122ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 18132ab9cd1cSSteven Whitehouse else 1814160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 18152ab9cd1cSSteven Whitehouse brelse(dibh); 18162ab9cd1cSSteven Whitehouse out: 18172ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 1818680baacbSAl Viro if (!IS_ERR(buf)) 1819fceef393SAl Viro set_delayed_call(done, kfree_link, buf); 1820680baacbSAl Viro return buf; 18212ab9cd1cSSteven Whitehouse } 18222ab9cd1cSSteven Whitehouse 18232ab9cd1cSSteven Whitehouse /** 18242ab9cd1cSSteven Whitehouse * gfs2_permission - 18252ab9cd1cSSteven Whitehouse * @inode: The inode 18262ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 18272ab9cd1cSSteven Whitehouse * @flags: Indicates whether this is an RCU path walk or not 18282ab9cd1cSSteven Whitehouse * 18292ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18302ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18312ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 18322ab9cd1cSSteven Whitehouse * 18332ab9cd1cSSteven Whitehouse * Returns: errno 18342ab9cd1cSSteven Whitehouse */ 18352ab9cd1cSSteven Whitehouse 183610556cb2SAl Viro int gfs2_permission(struct inode *inode, int mask) 18372ab9cd1cSSteven Whitehouse { 18382ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 18392ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18402ab9cd1cSSteven Whitehouse int error; 18412ab9cd1cSSteven Whitehouse 18426df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 18432ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 18442ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 184510556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 18462ab9cd1cSSteven Whitehouse return -ECHILD; 18472ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 18482ab9cd1cSSteven Whitehouse if (error) 18492ab9cd1cSSteven Whitehouse return error; 18502ab9cd1cSSteven Whitehouse } 18512ab9cd1cSSteven Whitehouse 18522ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1853337684a1SEryu Guan error = -EPERM; 18542ab9cd1cSSteven Whitehouse else 185547291baaSChristian Brauner error = generic_permission(&init_user_ns, inode, mask); 18566df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 18572ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 18582ab9cd1cSSteven Whitehouse 18592ab9cd1cSSteven Whitehouse return error; 18602ab9cd1cSSteven Whitehouse } 18612ab9cd1cSSteven Whitehouse 1862ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18632ab9cd1cSSteven Whitehouse { 18642f221d6fSChristian Brauner setattr_copy(&init_user_ns, inode, attr); 18652ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 18662ab9cd1cSSteven Whitehouse return 0; 18672ab9cd1cSSteven Whitehouse } 18682ab9cd1cSSteven Whitehouse 18692ab9cd1cSSteven Whitehouse /** 18702ab9cd1cSSteven Whitehouse * gfs2_setattr_simple - 18712ab9cd1cSSteven Whitehouse * @ip: 18722ab9cd1cSSteven Whitehouse * @attr: 18732ab9cd1cSSteven Whitehouse * 18742ab9cd1cSSteven Whitehouse * Returns: errno 18752ab9cd1cSSteven Whitehouse */ 18762ab9cd1cSSteven Whitehouse 1877ab9bbda0SSteven Whitehouse int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18782ab9cd1cSSteven Whitehouse { 18792ab9cd1cSSteven Whitehouse int error; 18802ab9cd1cSSteven Whitehouse 18812ab9cd1cSSteven Whitehouse if (current->journal_info) 1882ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 18832ab9cd1cSSteven Whitehouse 1884ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 18852ab9cd1cSSteven Whitehouse if (error) 18862ab9cd1cSSteven Whitehouse return error; 18872ab9cd1cSSteven Whitehouse 1888ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1889ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 18902ab9cd1cSSteven Whitehouse return error; 18912ab9cd1cSSteven Whitehouse } 18922ab9cd1cSSteven Whitehouse 18932ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 18942ab9cd1cSSteven Whitehouse { 18952ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18962ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 18977c06b5d6SEric W. Biederman kuid_t ouid, nuid; 18987c06b5d6SEric W. Biederman kgid_t ogid, ngid; 18992ab9cd1cSSteven Whitehouse int error; 1900b8fbf471SAbhi Das struct gfs2_alloc_parms ap; 19012ab9cd1cSSteven Whitehouse 19022ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 19032ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 19042ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 19052ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 19062ab9cd1cSSteven Whitehouse 19076b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1908f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 19096b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1910f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 19112fba46a0SBob Peterson error = gfs2_qa_get(ip); 191262e96cf8SBob Peterson if (error) 19132fba46a0SBob Peterson return error; 191462e96cf8SBob Peterson 191562e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 191662e96cf8SBob Peterson if (error) 191762e96cf8SBob Peterson goto out; 191862e96cf8SBob Peterson 191962e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 192062e96cf8SBob Peterson if (error) 192162e96cf8SBob Peterson goto out; 192262e96cf8SBob Peterson 1923b8fbf471SAbhi Das ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1924b8fbf471SAbhi Das 19256b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19266b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1927b8fbf471SAbhi Das error = gfs2_quota_check(ip, nuid, ngid, &ap); 19282ab9cd1cSSteven Whitehouse if (error) 19292ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19302ab9cd1cSSteven Whitehouse } 19312ab9cd1cSSteven Whitehouse 19322ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 19332ab9cd1cSSteven Whitehouse if (error) 19342ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19352ab9cd1cSSteven Whitehouse 1936ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 19372ab9cd1cSSteven Whitehouse if (error) 19382ab9cd1cSSteven Whitehouse goto out_end_trans; 19392ab9cd1cSSteven Whitehouse 19406b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19416b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 194239a72580SAbhi Das gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1943b8fbf471SAbhi Das gfs2_quota_change(ip, ap.target, nuid, ngid); 19442ab9cd1cSSteven Whitehouse } 19452ab9cd1cSSteven Whitehouse 19462ab9cd1cSSteven Whitehouse out_end_trans: 19472ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 19482ab9cd1cSSteven Whitehouse out_gunlock_q: 19492ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 195062e96cf8SBob Peterson out: 19512fba46a0SBob Peterson gfs2_qa_put(ip); 19522ab9cd1cSSteven Whitehouse return error; 19532ab9cd1cSSteven Whitehouse } 19542ab9cd1cSSteven Whitehouse 19552ab9cd1cSSteven Whitehouse /** 19562ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 19572ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 19582ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 19592ab9cd1cSSteven Whitehouse * 19602ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 19612ab9cd1cSSteven Whitehouse * that change out to disk. 19622ab9cd1cSSteven Whitehouse * 19632ab9cd1cSSteven Whitehouse * Returns: errno 19642ab9cd1cSSteven Whitehouse */ 19652ab9cd1cSSteven Whitehouse 19662ab9cd1cSSteven Whitehouse static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 19672ab9cd1cSSteven Whitehouse { 19682b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 19692ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19702ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 19712ab9cd1cSSteven Whitehouse int error; 19722ab9cd1cSSteven Whitehouse 19732fba46a0SBob Peterson error = gfs2_qa_get(ip); 19740a305e49SBob Peterson if (error) 19750a305e49SBob Peterson return error; 19760a305e49SBob Peterson 19772ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 19782ab9cd1cSSteven Whitehouse if (error) 19792fba46a0SBob Peterson goto out; 19802ab9cd1cSSteven Whitehouse 19812ab9cd1cSSteven Whitehouse error = -EPERM; 19822ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 19832fba46a0SBob Peterson goto error; 19842ab9cd1cSSteven Whitehouse 19852f221d6fSChristian Brauner error = setattr_prepare(&init_user_ns, dentry, attr); 19862ab9cd1cSSteven Whitehouse if (error) 19872fba46a0SBob Peterson goto error; 19882ab9cd1cSSteven Whitehouse 19892ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 19902ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 19912ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 19922ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 1993e01580bfSChristoph Hellwig else { 1994ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 1995e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 1996*e65ce2a5SChristian Brauner error = posix_acl_chmod(&init_user_ns, inode, 1997*e65ce2a5SChristian Brauner inode->i_mode); 1998e01580bfSChristoph Hellwig } 19992ab9cd1cSSteven Whitehouse 20002fba46a0SBob Peterson error: 20012ab9cd1cSSteven Whitehouse if (!error) 20022ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 2003ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 20042fba46a0SBob Peterson out: 20052fba46a0SBob Peterson gfs2_qa_put(ip); 20062ab9cd1cSSteven Whitehouse return error; 20072ab9cd1cSSteven Whitehouse } 20082ab9cd1cSSteven Whitehouse 20092ab9cd1cSSteven Whitehouse /** 20102ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 2011a528d35eSDavid Howells * @path: Object to query 20122ab9cd1cSSteven Whitehouse * @stat: The inode's stats 2013a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 2014a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 20152ab9cd1cSSteven Whitehouse * 20162ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 20172ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 20182ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 20192ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 20202ab9cd1cSSteven Whitehouse * with the glock already held. 20212ab9cd1cSSteven Whitehouse * 20222ab9cd1cSSteven Whitehouse * Returns: errno 20232ab9cd1cSSteven Whitehouse */ 20242ab9cd1cSSteven Whitehouse 2025a528d35eSDavid Howells static int gfs2_getattr(const struct path *path, struct kstat *stat, 2026a528d35eSDavid Howells u32 request_mask, unsigned int flags) 20272ab9cd1cSSteven Whitehouse { 2028a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 20292ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20302ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 2031b2623c2fSAndreas Gruenbacher u32 gfsflags; 20322ab9cd1cSSteven Whitehouse int error; 20332ab9cd1cSSteven Whitehouse 20346df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 20352ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 20362ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 20372ab9cd1cSSteven Whitehouse if (error) 20382ab9cd1cSSteven Whitehouse return error; 20392ab9cd1cSSteven Whitehouse } 20402ab9cd1cSSteven Whitehouse 2041b2623c2fSAndreas Gruenbacher gfsflags = ip->i_diskflags; 2042b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_APPENDONLY) 2043b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_APPEND; 2044b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_IMMUTABLE) 2045b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_IMMUTABLE; 2046b2623c2fSAndreas Gruenbacher 2047b2623c2fSAndreas Gruenbacher stat->attributes_mask |= (STATX_ATTR_APPEND | 2048b2623c2fSAndreas Gruenbacher STATX_ATTR_COMPRESSED | 2049b2623c2fSAndreas Gruenbacher STATX_ATTR_ENCRYPTED | 2050b2623c2fSAndreas Gruenbacher STATX_ATTR_IMMUTABLE | 2051b2623c2fSAndreas Gruenbacher STATX_ATTR_NODUMP); 2052b2623c2fSAndreas Gruenbacher 20532ab9cd1cSSteven Whitehouse generic_fillattr(inode, stat); 2054b2623c2fSAndreas Gruenbacher 20556df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 20562ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 20572ab9cd1cSSteven Whitehouse 20582ab9cd1cSSteven Whitehouse return 0; 20592ab9cd1cSSteven Whitehouse } 20602ab9cd1cSSteven Whitehouse 20612ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 20622ab9cd1cSSteven Whitehouse u64 start, u64 len) 20632ab9cd1cSSteven Whitehouse { 20642ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20652ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 20662ab9cd1cSSteven Whitehouse int ret; 20672ab9cd1cSSteven Whitehouse 2068aac1a55bSBob Peterson inode_lock_shared(inode); 20692ab9cd1cSSteven Whitehouse 20702ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20712ab9cd1cSSteven Whitehouse if (ret) 20722ab9cd1cSSteven Whitehouse goto out; 20732ab9cd1cSSteven Whitehouse 2074aac1a55bSBob Peterson ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 20752ab9cd1cSSteven Whitehouse 20762ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 2077aac1a55bSBob Peterson 20782ab9cd1cSSteven Whitehouse out: 2079aac1a55bSBob Peterson inode_unlock_shared(inode); 20802ab9cd1cSSteven Whitehouse return ret; 20812ab9cd1cSSteven Whitehouse } 20822ab9cd1cSSteven Whitehouse 20833a27411cSAndreas Gruenbacher loff_t gfs2_seek_data(struct file *file, loff_t offset) 20843a27411cSAndreas Gruenbacher { 20853a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 20863a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 20873a27411cSAndreas Gruenbacher struct gfs2_holder gh; 20883a27411cSAndreas Gruenbacher loff_t ret; 20893a27411cSAndreas Gruenbacher 20903a27411cSAndreas Gruenbacher inode_lock_shared(inode); 20913a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20923a27411cSAndreas Gruenbacher if (!ret) 20933a27411cSAndreas Gruenbacher ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 20943a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 20953a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 20963a27411cSAndreas Gruenbacher 20973a27411cSAndreas Gruenbacher if (ret < 0) 20983a27411cSAndreas Gruenbacher return ret; 20993a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21003a27411cSAndreas Gruenbacher } 21013a27411cSAndreas Gruenbacher 21023a27411cSAndreas Gruenbacher loff_t gfs2_seek_hole(struct file *file, loff_t offset) 21033a27411cSAndreas Gruenbacher { 21043a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21053a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21063a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21073a27411cSAndreas Gruenbacher loff_t ret; 21083a27411cSAndreas Gruenbacher 21093a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21103a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21113a27411cSAndreas Gruenbacher if (!ret) 21123a27411cSAndreas Gruenbacher ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 21133a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21143a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21153a27411cSAndreas Gruenbacher 21163a27411cSAndreas Gruenbacher if (ret < 0) 21173a27411cSAndreas Gruenbacher return ret; 21183a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21193a27411cSAndreas Gruenbacher } 21203a27411cSAndreas Gruenbacher 212182e938bdSAndreas Gruenbacher static int gfs2_update_time(struct inode *inode, struct timespec64 *time, 212282e938bdSAndreas Gruenbacher int flags) 212382e938bdSAndreas Gruenbacher { 212482e938bdSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 212582e938bdSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_gl; 212682e938bdSAndreas Gruenbacher struct gfs2_holder *gh; 212782e938bdSAndreas Gruenbacher int error; 212882e938bdSAndreas Gruenbacher 212982e938bdSAndreas Gruenbacher gh = gfs2_glock_is_locked_by_me(gl); 213082e938bdSAndreas Gruenbacher if (gh && !gfs2_glock_is_held_excl(gl)) { 213182e938bdSAndreas Gruenbacher gfs2_glock_dq(gh); 213282e938bdSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); 213382e938bdSAndreas Gruenbacher error = gfs2_glock_nq(gh); 213482e938bdSAndreas Gruenbacher if (error) 213582e938bdSAndreas Gruenbacher return error; 213682e938bdSAndreas Gruenbacher } 213782e938bdSAndreas Gruenbacher return generic_update_time(inode, time, flags); 213882e938bdSAndreas Gruenbacher } 213982e938bdSAndreas Gruenbacher 2140e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops = { 21412ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21422ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21432ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21442ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21452ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21464e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 2147e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 214882e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21492ab9cd1cSSteven Whitehouse }; 21502ab9cd1cSSteven Whitehouse 2151e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops = { 21522ab9cd1cSSteven Whitehouse .create = gfs2_create, 21532ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 21542ab9cd1cSSteven Whitehouse .link = gfs2_link, 21552ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 21562ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 21572ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 21582ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 21592ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 21602773bf00SMiklos Szeredi .rename = gfs2_rename2, 21612ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21622ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21632ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21642ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21652ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21664e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 2167e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 216882e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21696d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 21702ab9cd1cSSteven Whitehouse }; 21712ab9cd1cSSteven Whitehouse 2172e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops = { 21736b255391SAl Viro .get_link = gfs2_get_link, 21742ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21752ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21762ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21772ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21782ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21792ab9cd1cSSteven Whitehouse }; 21802ab9cd1cSSteven Whitehouse 2181