12ab9cd1cSSteven Whitehouse /* 22ab9cd1cSSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3f2741d98SSteven Whitehouse * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 42ab9cd1cSSteven Whitehouse * 52ab9cd1cSSteven Whitehouse * This copyrighted material is made available to anyone wishing to use, 62ab9cd1cSSteven Whitehouse * modify, copy, or redistribute it subject to the terms and conditions 72ab9cd1cSSteven Whitehouse * of the GNU General Public License version 2. 82ab9cd1cSSteven Whitehouse */ 92ab9cd1cSSteven Whitehouse 102ab9cd1cSSteven Whitehouse #include <linux/slab.h> 112ab9cd1cSSteven Whitehouse #include <linux/spinlock.h> 122ab9cd1cSSteven Whitehouse #include <linux/completion.h> 132ab9cd1cSSteven Whitehouse #include <linux/buffer_head.h> 142ab9cd1cSSteven Whitehouse #include <linux/namei.h> 152ab9cd1cSSteven Whitehouse #include <linux/mm.h> 162ab9cd1cSSteven Whitehouse #include <linux/xattr.h> 172ab9cd1cSSteven Whitehouse #include <linux/posix_acl.h> 182ab9cd1cSSteven Whitehouse #include <linux/gfs2_ondisk.h> 192ab9cd1cSSteven Whitehouse #include <linux/crc32.h> 202ab9cd1cSSteven Whitehouse #include <linux/fiemap.h> 212ab9cd1cSSteven Whitehouse #include <linux/security.h> 222ab9cd1cSSteven Whitehouse #include <asm/uaccess.h> 232ab9cd1cSSteven Whitehouse 242ab9cd1cSSteven Whitehouse #include "gfs2.h" 252ab9cd1cSSteven Whitehouse #include "incore.h" 262ab9cd1cSSteven Whitehouse #include "acl.h" 272ab9cd1cSSteven Whitehouse #include "bmap.h" 282ab9cd1cSSteven Whitehouse #include "dir.h" 292ab9cd1cSSteven Whitehouse #include "xattr.h" 302ab9cd1cSSteven Whitehouse #include "glock.h" 312ab9cd1cSSteven Whitehouse #include "inode.h" 322ab9cd1cSSteven Whitehouse #include "meta_io.h" 332ab9cd1cSSteven Whitehouse #include "quota.h" 342ab9cd1cSSteven Whitehouse #include "rgrp.h" 352ab9cd1cSSteven Whitehouse #include "trans.h" 362ab9cd1cSSteven Whitehouse #include "util.h" 372ab9cd1cSSteven Whitehouse #include "super.h" 382ab9cd1cSSteven Whitehouse #include "glops.h" 392ab9cd1cSSteven Whitehouse 402ab9cd1cSSteven Whitehouse struct gfs2_skip_data { 412ab9cd1cSSteven Whitehouse u64 no_addr; 422ab9cd1cSSteven Whitehouse int skipped; 432ab9cd1cSSteven Whitehouse int non_block; 442ab9cd1cSSteven Whitehouse }; 452ab9cd1cSSteven Whitehouse 462ab9cd1cSSteven Whitehouse static int iget_test(struct inode *inode, void *opaque) 472ab9cd1cSSteven Whitehouse { 482ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 492ab9cd1cSSteven Whitehouse struct gfs2_skip_data *data = opaque; 502ab9cd1cSSteven Whitehouse 512ab9cd1cSSteven Whitehouse if (ip->i_no_addr == data->no_addr) { 522ab9cd1cSSteven Whitehouse if (data->non_block && 532ab9cd1cSSteven Whitehouse inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { 542ab9cd1cSSteven Whitehouse data->skipped = 1; 552ab9cd1cSSteven Whitehouse return 0; 562ab9cd1cSSteven Whitehouse } 572ab9cd1cSSteven Whitehouse return 1; 582ab9cd1cSSteven Whitehouse } 592ab9cd1cSSteven Whitehouse return 0; 602ab9cd1cSSteven Whitehouse } 612ab9cd1cSSteven Whitehouse 622ab9cd1cSSteven Whitehouse static int iget_set(struct inode *inode, void *opaque) 632ab9cd1cSSteven Whitehouse { 642ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 652ab9cd1cSSteven Whitehouse struct gfs2_skip_data *data = opaque; 662ab9cd1cSSteven Whitehouse 672ab9cd1cSSteven Whitehouse if (data->skipped) 682ab9cd1cSSteven Whitehouse return -ENOENT; 692ab9cd1cSSteven Whitehouse inode->i_ino = (unsigned long)(data->no_addr); 702ab9cd1cSSteven Whitehouse ip->i_no_addr = data->no_addr; 712ab9cd1cSSteven Whitehouse return 0; 722ab9cd1cSSteven Whitehouse } 732ab9cd1cSSteven Whitehouse 742ab9cd1cSSteven Whitehouse struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) 752ab9cd1cSSteven Whitehouse { 762ab9cd1cSSteven Whitehouse unsigned long hash = (unsigned long)no_addr; 772ab9cd1cSSteven Whitehouse struct gfs2_skip_data data; 782ab9cd1cSSteven Whitehouse 792ab9cd1cSSteven Whitehouse data.no_addr = no_addr; 802ab9cd1cSSteven Whitehouse data.skipped = 0; 812ab9cd1cSSteven Whitehouse data.non_block = non_block; 822ab9cd1cSSteven Whitehouse return ilookup5(sb, hash, iget_test, &data); 832ab9cd1cSSteven Whitehouse } 842ab9cd1cSSteven Whitehouse 852ab9cd1cSSteven Whitehouse static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, 862ab9cd1cSSteven Whitehouse int non_block) 872ab9cd1cSSteven Whitehouse { 882ab9cd1cSSteven Whitehouse struct gfs2_skip_data data; 892ab9cd1cSSteven Whitehouse unsigned long hash = (unsigned long)no_addr; 902ab9cd1cSSteven Whitehouse 912ab9cd1cSSteven Whitehouse data.no_addr = no_addr; 922ab9cd1cSSteven Whitehouse data.skipped = 0; 932ab9cd1cSSteven Whitehouse data.non_block = non_block; 942ab9cd1cSSteven Whitehouse return iget5_locked(sb, hash, iget_test, iget_set, &data); 952ab9cd1cSSteven Whitehouse } 962ab9cd1cSSteven Whitehouse 972ab9cd1cSSteven Whitehouse /** 982ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 992ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 1002ab9cd1cSSteven Whitehouse * 1012ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 1022ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 1032ab9cd1cSSteven Whitehouse */ 1042ab9cd1cSSteven Whitehouse 1052ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 1062ab9cd1cSSteven Whitehouse { 1072ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1082ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 1092ab9cd1cSSteven Whitehouse 1102ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 1112ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1122ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 1132ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 1142ab9cd1cSSteven Whitehouse else 1152ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 1162ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 1172ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 1182ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 1192ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 1202ab9cd1cSSteven Whitehouse else 1212ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 1222ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 1232ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 1242ab9cd1cSSteven Whitehouse } else { 1252ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 1262ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 1272ab9cd1cSSteven Whitehouse } 1282ab9cd1cSSteven Whitehouse } 1292ab9cd1cSSteven Whitehouse 1302ab9cd1cSSteven Whitehouse /** 1312ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 1322ab9cd1cSSteven Whitehouse * @sb: The super block 1332ab9cd1cSSteven Whitehouse * @no_addr: The inode number 1342ab9cd1cSSteven Whitehouse * @type: The type of the inode 1352ab9cd1cSSteven Whitehouse * non_block: Can we block on inodes that are being freed? 1362ab9cd1cSSteven Whitehouse * 1372ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1382ab9cd1cSSteven Whitehouse */ 1392ab9cd1cSSteven Whitehouse 1402ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1412ab9cd1cSSteven Whitehouse u64 no_addr, u64 no_formal_ino, int non_block) 1422ab9cd1cSSteven Whitehouse { 1432ab9cd1cSSteven Whitehouse struct inode *inode; 1442ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1452ab9cd1cSSteven Whitehouse struct gfs2_glock *io_gl = NULL; 1462ab9cd1cSSteven Whitehouse int error; 1472ab9cd1cSSteven Whitehouse 1482ab9cd1cSSteven Whitehouse inode = gfs2_iget(sb, no_addr, non_block); 1492ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 1502ab9cd1cSSteven Whitehouse 1512ab9cd1cSSteven Whitehouse if (!inode) 1522ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOBUFS); 1532ab9cd1cSSteven Whitehouse 1542ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1552ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1562ab9cd1cSSteven Whitehouse ip->i_no_formal_ino = no_formal_ino; 1572ab9cd1cSSteven Whitehouse 1582ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 1592ab9cd1cSSteven Whitehouse if (unlikely(error)) 1602ab9cd1cSSteven Whitehouse goto fail; 1612ab9cd1cSSteven Whitehouse ip->i_gl->gl_object = ip; 1622ab9cd1cSSteven Whitehouse 1632ab9cd1cSSteven Whitehouse error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 1642ab9cd1cSSteven Whitehouse if (unlikely(error)) 1652ab9cd1cSSteven Whitehouse goto fail_put; 1662ab9cd1cSSteven Whitehouse 1672ab9cd1cSSteven Whitehouse set_bit(GIF_INVALID, &ip->i_flags); 1682ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 1692ab9cd1cSSteven Whitehouse if (unlikely(error)) 1702ab9cd1cSSteven Whitehouse goto fail_iopen; 1712ab9cd1cSSteven Whitehouse 1722ab9cd1cSSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = ip; 1732ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1742ab9cd1cSSteven Whitehouse io_gl = NULL; 1752ab9cd1cSSteven Whitehouse 1762ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1772ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 1782ab9cd1cSSteven Whitehouse error = gfs2_inode_refresh(GFS2_I(inode)); 1792ab9cd1cSSteven Whitehouse if (error) 1802ab9cd1cSSteven Whitehouse goto fail_refresh; 1812ab9cd1cSSteven Whitehouse } else { 1822ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 1832ab9cd1cSSteven Whitehouse } 1842ab9cd1cSSteven Whitehouse 1852ab9cd1cSSteven Whitehouse gfs2_set_iop(inode); 1862ab9cd1cSSteven Whitehouse unlock_new_inode(inode); 1872ab9cd1cSSteven Whitehouse } 1882ab9cd1cSSteven Whitehouse 1892ab9cd1cSSteven Whitehouse return inode; 1902ab9cd1cSSteven Whitehouse 1912ab9cd1cSSteven Whitehouse fail_refresh: 1922ab9cd1cSSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = NULL; 1932ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&ip->i_iopen_gh); 1942ab9cd1cSSteven Whitehouse fail_iopen: 1952ab9cd1cSSteven Whitehouse if (io_gl) 1962ab9cd1cSSteven Whitehouse gfs2_glock_put(io_gl); 1972ab9cd1cSSteven Whitehouse fail_put: 1982ab9cd1cSSteven Whitehouse ip->i_gl->gl_object = NULL; 1992ab9cd1cSSteven Whitehouse gfs2_glock_put(ip->i_gl); 2002ab9cd1cSSteven Whitehouse fail: 2012ab9cd1cSSteven Whitehouse iget_failed(inode); 2022ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2032ab9cd1cSSteven Whitehouse } 2042ab9cd1cSSteven Whitehouse 2052ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2062ab9cd1cSSteven Whitehouse u64 *no_formal_ino, unsigned int blktype) 2072ab9cd1cSSteven Whitehouse { 2082ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2092ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 2102ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 2112ab9cd1cSSteven Whitehouse int error; 2122ab9cd1cSSteven Whitehouse 2132ab9cd1cSSteven Whitehouse /* Must not read in block until block type is verified */ 2142ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, 2152ab9cd1cSSteven Whitehouse LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); 2162ab9cd1cSSteven Whitehouse if (error) 2172ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2182ab9cd1cSSteven Whitehouse 2192ab9cd1cSSteven Whitehouse error = gfs2_check_blk_type(sdp, no_addr, blktype); 2202ab9cd1cSSteven Whitehouse if (error) 2212ab9cd1cSSteven Whitehouse goto fail; 2222ab9cd1cSSteven Whitehouse 2232ab9cd1cSSteven Whitehouse inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); 2242ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2252ab9cd1cSSteven Whitehouse goto fail; 2262ab9cd1cSSteven Whitehouse 2272ab9cd1cSSteven Whitehouse /* Two extra checks for NFS only */ 2282ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2292ab9cd1cSSteven Whitehouse error = -ESTALE; 2302ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) 2312ab9cd1cSSteven Whitehouse goto fail_iput; 2322ab9cd1cSSteven Whitehouse 2332ab9cd1cSSteven Whitehouse error = -EIO; 2342ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2352ab9cd1cSSteven Whitehouse goto fail_iput; 2362ab9cd1cSSteven Whitehouse 2372ab9cd1cSSteven Whitehouse error = 0; 2382ab9cd1cSSteven Whitehouse } 2392ab9cd1cSSteven Whitehouse 2402ab9cd1cSSteven Whitehouse fail: 2412ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 2422ab9cd1cSSteven Whitehouse return error ? ERR_PTR(error) : inode; 2432ab9cd1cSSteven Whitehouse fail_iput: 2442ab9cd1cSSteven Whitehouse iput(inode); 2452ab9cd1cSSteven Whitehouse goto fail; 2462ab9cd1cSSteven Whitehouse } 2472ab9cd1cSSteven Whitehouse 2482ab9cd1cSSteven Whitehouse 2492ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2502ab9cd1cSSteven Whitehouse { 2512ab9cd1cSSteven Whitehouse struct qstr qstr; 2522ab9cd1cSSteven Whitehouse struct inode *inode; 2532ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2542ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2552ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2562ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2572ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2582ab9cd1cSSteven Whitehouse * and do not check for NULL. 2592ab9cd1cSSteven Whitehouse */ 2602ab9cd1cSSteven Whitehouse if (inode == NULL) 2612ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2622ab9cd1cSSteven Whitehouse else 2632ab9cd1cSSteven Whitehouse return inode; 2642ab9cd1cSSteven Whitehouse } 2652ab9cd1cSSteven Whitehouse 2662ab9cd1cSSteven Whitehouse 2672ab9cd1cSSteven Whitehouse /** 2682ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 2692ab9cd1cSSteven Whitehouse * @d_gh: An initialized holder for the directory glock 2702ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2712ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2722ab9cd1cSSteven Whitehouse * @i_gh: An uninitialized holder for the new inode glock 2732ab9cd1cSSteven Whitehouse * 2742ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2752ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2762ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2772ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2782ab9cd1cSSteven Whitehouse * 2792ab9cd1cSSteven Whitehouse * Returns: errno 2802ab9cd1cSSteven Whitehouse */ 2812ab9cd1cSSteven Whitehouse 2822ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 2832ab9cd1cSSteven Whitehouse int is_root) 2842ab9cd1cSSteven Whitehouse { 2852ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 2862ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 2872ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 2882ab9cd1cSSteven Whitehouse int error = 0; 2892ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 2902ab9cd1cSSteven Whitehouse int unlock = 0; 2912ab9cd1cSSteven Whitehouse 2922ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 2932ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 2942ab9cd1cSSteven Whitehouse 2952ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 2962ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 2972ab9cd1cSSteven Whitehouse dir == sb->s_root->d_inode)) { 2982ab9cd1cSSteven Whitehouse igrab(dir); 2992ab9cd1cSSteven Whitehouse return dir; 3002ab9cd1cSSteven Whitehouse } 3012ab9cd1cSSteven Whitehouse 3022ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3032ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3042ab9cd1cSSteven Whitehouse if (error) 3052ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3062ab9cd1cSSteven Whitehouse unlock = 1; 3072ab9cd1cSSteven Whitehouse } 3082ab9cd1cSSteven Whitehouse 3092ab9cd1cSSteven Whitehouse if (!is_root) { 31010556cb2SAl Viro error = gfs2_permission(dir, MAY_EXEC); 3112ab9cd1cSSteven Whitehouse if (error) 3122ab9cd1cSSteven Whitehouse goto out; 3132ab9cd1cSSteven Whitehouse } 3142ab9cd1cSSteven Whitehouse 3152ab9cd1cSSteven Whitehouse inode = gfs2_dir_search(dir, name); 3162ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3172ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3182ab9cd1cSSteven Whitehouse out: 3192ab9cd1cSSteven Whitehouse if (unlock) 3202ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3212ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3222ab9cd1cSSteven Whitehouse return NULL; 3232ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3242ab9cd1cSSteven Whitehouse } 3252ab9cd1cSSteven Whitehouse 3262ab9cd1cSSteven Whitehouse /** 3272ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3282ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3292ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3302ab9cd1cSSteven Whitehouse * @mode: 3312ab9cd1cSSteven Whitehouse * 3322ab9cd1cSSteven Whitehouse * Returns: errno 3332ab9cd1cSSteven Whitehouse */ 3342ab9cd1cSSteven Whitehouse 3352ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 336175a4eb7SAl Viro umode_t mode) 3372ab9cd1cSSteven Whitehouse { 3382ab9cd1cSSteven Whitehouse int error; 3392ab9cd1cSSteven Whitehouse 34010556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 3412ab9cd1cSSteven Whitehouse if (error) 3422ab9cd1cSSteven Whitehouse return error; 3432ab9cd1cSSteven Whitehouse 3442ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3452ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3462ab9cd1cSSteven Whitehouse return -ENOENT; 3472ab9cd1cSSteven Whitehouse 3482ab9cd1cSSteven Whitehouse error = gfs2_dir_check(&dip->i_inode, name, NULL); 3492ab9cd1cSSteven Whitehouse switch (error) { 3502ab9cd1cSSteven Whitehouse case -ENOENT: 3512ab9cd1cSSteven Whitehouse error = 0; 3522ab9cd1cSSteven Whitehouse break; 3532ab9cd1cSSteven Whitehouse case 0: 3542ab9cd1cSSteven Whitehouse return -EEXIST; 3552ab9cd1cSSteven Whitehouse default: 3562ab9cd1cSSteven Whitehouse return error; 3572ab9cd1cSSteven Whitehouse } 3582ab9cd1cSSteven Whitehouse 3592ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3602ab9cd1cSSteven Whitehouse return -EFBIG; 3612ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3622ab9cd1cSSteven Whitehouse return -EMLINK; 3632ab9cd1cSSteven Whitehouse 3642ab9cd1cSSteven Whitehouse return 0; 3652ab9cd1cSSteven Whitehouse } 3662ab9cd1cSSteven Whitehouse 367c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 368c9aecf73SSteven Whitehouse struct inode *inode) 3692ab9cd1cSSteven Whitehouse { 3702ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3716b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3726b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 373c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 374c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3756b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 376c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 377c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3782ab9cd1cSSteven Whitehouse } else 379c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3802ab9cd1cSSteven Whitehouse 3812ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 382c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 383c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 384c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3852ab9cd1cSSteven Whitehouse } else 386c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3872ab9cd1cSSteven Whitehouse } 3882ab9cd1cSSteven Whitehouse 3899dbe9610SSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags) 3902ab9cd1cSSteven Whitehouse { 391c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 3922ab9cd1cSSteven Whitehouse int error; 3936a8099edSSteven Whitehouse int dblocks = 1; 3942ab9cd1cSSteven Whitehouse 395fd4b4e04SSteven Whitehouse error = gfs2_quota_lock_check(ip); 3962ab9cd1cSSteven Whitehouse if (error) 3972ab9cd1cSSteven Whitehouse goto out; 3982ab9cd1cSSteven Whitehouse 399fd4b4e04SSteven Whitehouse error = gfs2_inplace_reserve(ip, RES_DINODE, flags); 400fd4b4e04SSteven Whitehouse if (error) 401fd4b4e04SSteven Whitehouse goto out_quota; 402fd4b4e04SSteven Whitehouse 403fd4b4e04SSteven Whitehouse error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 0); 4042ab9cd1cSSteven Whitehouse if (error) 4052ab9cd1cSSteven Whitehouse goto out_ipreserv; 4062ab9cd1cSSteven Whitehouse 407c9aecf73SSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, &dblocks, 1, &ip->i_generation); 408c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 409c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 410c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 4112ab9cd1cSSteven Whitehouse 4122ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4132ab9cd1cSSteven Whitehouse 4142ab9cd1cSSteven Whitehouse out_ipreserv: 415c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 416fd4b4e04SSteven Whitehouse out_quota: 417fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4182ab9cd1cSSteven Whitehouse out: 4192ab9cd1cSSteven Whitehouse return error; 4202ab9cd1cSSteven Whitehouse } 4212ab9cd1cSSteven Whitehouse 422f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 423f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 424e2d0a13bSSteven Whitehouse { 425e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 426e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 427e2d0a13bSSteven Whitehouse 428e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 429e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 430e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 431e2d0a13bSSteven Whitehouse 432e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 433e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 434e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 435e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 436e2d0a13bSSteven Whitehouse 437e2d0a13bSSteven Whitehouse } 438e2d0a13bSSteven Whitehouse 4392ab9cd1cSSteven Whitehouse /** 4402ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 441f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 442c9aecf73SSteven Whitehouse * @ip: The inode 443f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 444f2741d98SSteven Whitehouse * @bhp: The buffer head (returned to caller) 4452ab9cd1cSSteven Whitehouse * 4462ab9cd1cSSteven Whitehouse */ 4472ab9cd1cSSteven Whitehouse 448c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 44979ba7480SSteven Whitehouse const char *symname) 4502ab9cd1cSSteven Whitehouse { 4512ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4522ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4532ab9cd1cSSteven Whitehouse 454c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 455350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4562ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 45779ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4582ab9cd1cSSteven Whitehouse 459c9aecf73SSteven Whitehouse di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); 460c9aecf73SSteven Whitehouse di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); 4612ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4622ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4632ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4642ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4652ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 46679ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 4672ab9cd1cSSteven Whitehouse 468c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 469160b4026SSteven Whitehouse case S_IFDIR: 470e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 471160b4026SSteven Whitehouse break; 472160b4026SSteven Whitehouse case S_IFLNK: 473c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 474160b4026SSteven Whitehouse break; 475e2d0a13bSSteven Whitehouse } 476e2d0a13bSSteven Whitehouse 4772ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 47879ba7480SSteven Whitehouse brelse(dibh); 4792ab9cd1cSSteven Whitehouse } 4802ab9cd1cSSteven Whitehouse 4812ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 482fd4b4e04SSteven Whitehouse struct gfs2_inode *ip, int arq) 4832ab9cd1cSSteven Whitehouse { 4842ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 4852ab9cd1cSSteven Whitehouse int error; 4862ab9cd1cSSteven Whitehouse 487fd4b4e04SSteven Whitehouse if (arq) { 48828fb3027SSteven Whitehouse error = gfs2_quota_lock_check(dip); 4892ab9cd1cSSteven Whitehouse if (error) 4902ab9cd1cSSteven Whitehouse goto fail_quota_locks; 4912ab9cd1cSSteven Whitehouse 4929dbe9610SSteven Whitehouse error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0); 4932ab9cd1cSSteven Whitehouse if (error) 4942ab9cd1cSSteven Whitehouse goto fail_quota_locks; 4952ab9cd1cSSteven Whitehouse 4962ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 49754335b1fSSteven Whitehouse dip->i_rgd->rd_length + 4982ab9cd1cSSteven Whitehouse 2 * RES_DINODE + 4992ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA, 0); 5002ab9cd1cSSteven Whitehouse if (error) 5012ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5022ab9cd1cSSteven Whitehouse } else { 5032ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5042ab9cd1cSSteven Whitehouse if (error) 5052ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5062ab9cd1cSSteven Whitehouse } 5072ab9cd1cSSteven Whitehouse 5082ab9cd1cSSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip); 5092ab9cd1cSSteven Whitehouse if (error) 5102ab9cd1cSSteven Whitehouse goto fail_end_trans; 5112ab9cd1cSSteven Whitehouse 5122ab9cd1cSSteven Whitehouse fail_end_trans: 5132ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5142ab9cd1cSSteven Whitehouse fail_ipreserv: 5152ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5162ab9cd1cSSteven Whitehouse fail_quota_locks: 5172ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5182ab9cd1cSSteven Whitehouse return error; 5192ab9cd1cSSteven Whitehouse } 5202ab9cd1cSSteven Whitehouse 52146cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5229d8f13baSMimi Zohar void *fs_info) 5232ab9cd1cSSteven Whitehouse { 5249d8f13baSMimi Zohar const struct xattr *xattr; 5259d8f13baSMimi Zohar int err = 0; 5262ab9cd1cSSteven Whitehouse 5279d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5289d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5299d8f13baSMimi Zohar xattr->value_len, 0, 5309d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5319d8f13baSMimi Zohar if (err < 0) 5329d8f13baSMimi Zohar break; 5339d8f13baSMimi Zohar } 5342ab9cd1cSSteven Whitehouse return err; 5352ab9cd1cSSteven Whitehouse } 5362ab9cd1cSSteven Whitehouse 5379d8f13baSMimi Zohar static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, 5389d8f13baSMimi Zohar const struct qstr *qstr) 5399d8f13baSMimi Zohar { 5409d8f13baSMimi Zohar return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, 5419d8f13baSMimi Zohar &gfs2_initxattrs, NULL); 5422ab9cd1cSSteven Whitehouse } 5432ab9cd1cSSteven Whitehouse 5442ab9cd1cSSteven Whitehouse /** 545f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 546f2741d98SSteven Whitehouse * @dir: The parent directory 547f2741d98SSteven Whitehouse * @dentry: The new dentry 548f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 549f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 550f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 551f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 5522ab9cd1cSSteven Whitehouse * 553f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 5542ab9cd1cSSteven Whitehouse */ 5552ab9cd1cSSteven Whitehouse 556f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 557175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 5589a63edd1SSteven Whitehouse unsigned int size, int excl) 5592ab9cd1cSSteven Whitehouse { 560f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 561f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 5622ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 5638e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 5642ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 565c9aecf73SSteven Whitehouse struct gfs2_glock *io_gl; 5662ab9cd1cSSteven Whitehouse int error; 5679dbe9610SSteven Whitehouse u32 aflags = 0; 568fd4b4e04SSteven Whitehouse int arq; 5692ab9cd1cSSteven Whitehouse 5702ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 571f2741d98SSteven Whitehouse return -ENAMETOOLONG; 5722ab9cd1cSSteven Whitehouse 5730a305e49SBob Peterson error = gfs2_rs_alloc(dip); 5740a305e49SBob Peterson if (error) 5750a305e49SBob Peterson return error; 5760a305e49SBob Peterson 577fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 578fd4b4e04SSteven Whitehouse if (error) 579fd4b4e04SSteven Whitehouse return error; 580fd4b4e04SSteven Whitehouse 581f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 5822ab9cd1cSSteven Whitehouse if (error) 5832ab9cd1cSSteven Whitehouse goto fail; 5842ab9cd1cSSteven Whitehouse 5852ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 5869a63edd1SSteven Whitehouse if ((error == -EEXIST) && S_ISREG(mode) && !excl) { 5879a63edd1SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 5889a63edd1SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 5899a63edd1SSteven Whitehouse d_instantiate(dentry, inode); 5909a63edd1SSteven Whitehouse return IS_ERR(inode) ? PTR_ERR(inode) : 0; 5919a63edd1SSteven Whitehouse } 5922ab9cd1cSSteven Whitehouse if (error) 5932ab9cd1cSSteven Whitehouse goto fail_gunlock; 5942ab9cd1cSSteven Whitehouse 595fd4b4e04SSteven Whitehouse arq = error = gfs2_diradd_alloc_required(dir, name); 596fd4b4e04SSteven Whitehouse if (error < 0) 597fd4b4e04SSteven Whitehouse goto fail_gunlock; 598fd4b4e04SSteven Whitehouse 599c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 600fd4b4e04SSteven Whitehouse error = -ENOMEM; 601fd4b4e04SSteven Whitehouse if (!inode) 602fd4b4e04SSteven Whitehouse goto fail_gunlock; 603fd4b4e04SSteven Whitehouse 6048e2e0047SBob Peterson ip = GFS2_I(inode); 605ff7f4cb4SSteven Whitehouse error = gfs2_rs_alloc(ip); 606ff7f4cb4SSteven Whitehouse if (error) 607c9aecf73SSteven Whitehouse goto fail_free_inode; 608c9aecf73SSteven Whitehouse 609c9aecf73SSteven Whitehouse inode->i_mode = mode; 61079ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 611c9aecf73SSteven Whitehouse inode->i_rdev = dev; 612c9aecf73SSteven Whitehouse inode->i_size = size; 613fd4b4e04SSteven Whitehouse inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 61428fb3027SSteven Whitehouse gfs2_set_inode_blocks(inode, 1); 615c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 616c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 61728fb3027SSteven Whitehouse ip->i_diskflags = 0; 61828fb3027SSteven Whitehouse ip->i_eattr = 0; 61928fb3027SSteven Whitehouse ip->i_height = 0; 62028fb3027SSteven Whitehouse ip->i_depth = 0; 62128fb3027SSteven Whitehouse ip->i_entries = 0; 62228fb3027SSteven Whitehouse 62328fb3027SSteven Whitehouse switch(mode & S_IFMT) { 62428fb3027SSteven Whitehouse case S_IFREG: 62528fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 62628fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 62728fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 62828fb3027SSteven Whitehouse gfs2_set_aops(inode); 62928fb3027SSteven Whitehouse break; 63028fb3027SSteven Whitehouse case S_IFDIR: 63128fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 63228fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 63328fb3027SSteven Whitehouse ip->i_entries = 2; 63428fb3027SSteven Whitehouse break; 63528fb3027SSteven Whitehouse } 63628fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 637c9aecf73SSteven Whitehouse 6389dbe9610SSteven Whitehouse if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) || 6399dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 6409dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 6419dbe9610SSteven Whitehouse 6429dbe9610SSteven Whitehouse error = alloc_dinode(ip, aflags); 643c9aecf73SSteven Whitehouse if (error) 644c9aecf73SSteven Whitehouse goto fail_free_inode; 645c9aecf73SSteven Whitehouse 646c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 647c9aecf73SSteven Whitehouse if (error) 648c9aecf73SSteven Whitehouse goto fail_free_inode; 649c9aecf73SSteven Whitehouse 6501e2d9d44SBob Peterson ip->i_gl->gl_object = ip; 651c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 652c9aecf73SSteven Whitehouse if (error) 653c9aecf73SSteven Whitehouse goto fail_free_inode; 654c9aecf73SSteven Whitehouse 655fd4b4e04SSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE, 0); 656c9aecf73SSteven Whitehouse if (error) 657ff7f4cb4SSteven Whitehouse goto fail_gunlock2; 6580a305e49SBob Peterson 65979ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 660fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 661fd4b4e04SSteven Whitehouse 662c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 663c9aecf73SSteven Whitehouse if (error) 664c9aecf73SSteven Whitehouse goto fail_gunlock2; 665c9aecf73SSteven Whitehouse 666c9aecf73SSteven Whitehouse error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); 667c9aecf73SSteven Whitehouse if (error) 668c9aecf73SSteven Whitehouse goto fail_gunlock2; 669c9aecf73SSteven Whitehouse 670c9aecf73SSteven Whitehouse ip->i_iopen_gh.gh_gl->gl_object = ip; 671c9aecf73SSteven Whitehouse gfs2_glock_put(io_gl); 672c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 673c9aecf73SSteven Whitehouse insert_inode_hash(inode); 674c9aecf73SSteven Whitehouse 6752ab9cd1cSSteven Whitehouse error = gfs2_acl_create(dip, inode); 6762ab9cd1cSSteven Whitehouse if (error) 677c9aecf73SSteven Whitehouse goto fail_gunlock3; 6782ab9cd1cSSteven Whitehouse 6798e2e0047SBob Peterson error = gfs2_security_init(dip, ip, name); 6802ab9cd1cSSteven Whitehouse if (error) 681c9aecf73SSteven Whitehouse goto fail_gunlock3; 6822ab9cd1cSSteven Whitehouse 683fd4b4e04SSteven Whitehouse error = link_dinode(dip, name, ip, arq); 6842ab9cd1cSSteven Whitehouse if (error) 685c9aecf73SSteven Whitehouse goto fail_gunlock3; 6862ab9cd1cSSteven Whitehouse 68779ba7480SSteven Whitehouse mark_inode_dirty(inode); 68828fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 68928fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 690f2741d98SSteven Whitehouse d_instantiate(dentry, inode); 691f2741d98SSteven Whitehouse return 0; 6922ab9cd1cSSteven Whitehouse 693c9aecf73SSteven Whitehouse fail_gunlock3: 694c9aecf73SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 695c9aecf73SSteven Whitehouse if (ip->i_gl) 696c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 697c9aecf73SSteven Whitehouse goto fail_gunlock; 698c9aecf73SSteven Whitehouse 6992ab9cd1cSSteven Whitehouse fail_gunlock2: 7002ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 701c9aecf73SSteven Whitehouse fail_free_inode: 702c9aecf73SSteven Whitehouse if (ip->i_gl) 703c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 704c9aecf73SSteven Whitehouse gfs2_rs_delete(ip); 705c9aecf73SSteven Whitehouse free_inode_nonrcu(inode); 706c9aecf73SSteven Whitehouse inode = NULL; 7072ab9cd1cSSteven Whitehouse fail_gunlock: 708f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 70940ac218fSSteven Whitehouse if (inode && !IS_ERR(inode)) { 71079ba7480SSteven Whitehouse clear_nlink(inode); 71179ba7480SSteven Whitehouse mark_inode_dirty(inode); 71240ac218fSSteven Whitehouse set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags); 71340ac218fSSteven Whitehouse iput(inode); 71440ac218fSSteven Whitehouse } 7152ab9cd1cSSteven Whitehouse fail: 716f2741d98SSteven Whitehouse return error; 7172ab9cd1cSSteven Whitehouse } 718f2741d98SSteven Whitehouse 7192ab9cd1cSSteven Whitehouse /** 7202ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 7212ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 7222ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 7232ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 7242ab9cd1cSSteven Whitehouse * 7252ab9cd1cSSteven Whitehouse * Returns: errno 7262ab9cd1cSSteven Whitehouse */ 7272ab9cd1cSSteven Whitehouse 7282ab9cd1cSSteven Whitehouse static int gfs2_create(struct inode *dir, struct dentry *dentry, 729ebfc3b49SAl Viro umode_t mode, bool excl) 7302ab9cd1cSSteven Whitehouse { 7319a63edd1SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl); 7322ab9cd1cSSteven Whitehouse } 7332ab9cd1cSSteven Whitehouse 7342ab9cd1cSSteven Whitehouse /** 7352ab9cd1cSSteven Whitehouse * gfs2_lookup - Look up a filename in a directory and return its inode 7362ab9cd1cSSteven Whitehouse * @dir: The directory inode 7372ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 7382ab9cd1cSSteven Whitehouse * @nd: passed from Linux VFS, ignored by us 7392ab9cd1cSSteven Whitehouse * 7402ab9cd1cSSteven Whitehouse * Called by the VFS layer. Lock dir and call gfs2_lookupi() 7412ab9cd1cSSteven Whitehouse * 7422ab9cd1cSSteven Whitehouse * Returns: errno 7432ab9cd1cSSteven Whitehouse */ 7442ab9cd1cSSteven Whitehouse 7452ab9cd1cSSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 74600cd8dd3SAl Viro unsigned int flags) 7472ab9cd1cSSteven Whitehouse { 7486c673ab3SAl Viro struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0); 7496c673ab3SAl Viro if (inode && !IS_ERR(inode)) { 7502ab9cd1cSSteven Whitehouse struct gfs2_glock *gl = GFS2_I(inode)->i_gl; 7512ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 7522ab9cd1cSSteven Whitehouse int error; 7532ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 7542ab9cd1cSSteven Whitehouse if (error) { 7552ab9cd1cSSteven Whitehouse iput(inode); 7562ab9cd1cSSteven Whitehouse return ERR_PTR(error); 7572ab9cd1cSSteven Whitehouse } 7582ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 7592ab9cd1cSSteven Whitehouse } 7606c673ab3SAl Viro return d_splice_alias(inode, dentry); 7612ab9cd1cSSteven Whitehouse } 7622ab9cd1cSSteven Whitehouse 7632ab9cd1cSSteven Whitehouse /** 7642ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 7652ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 7662ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 7672ab9cd1cSSteven Whitehouse * @dentry: The name of the link 7682ab9cd1cSSteven Whitehouse * 7692ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 7702ab9cd1cSSteven Whitehouse * name in "dentry". 7712ab9cd1cSSteven Whitehouse * 7722ab9cd1cSSteven Whitehouse * Returns: errno 7732ab9cd1cSSteven Whitehouse */ 7742ab9cd1cSSteven Whitehouse 7752ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 7762ab9cd1cSSteven Whitehouse struct dentry *dentry) 7772ab9cd1cSSteven Whitehouse { 7782ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 7792ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 7802ab9cd1cSSteven Whitehouse struct inode *inode = old_dentry->d_inode; 7812ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 7822ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 7832ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 7842ab9cd1cSSteven Whitehouse int alloc_required; 7852ab9cd1cSSteven Whitehouse int error; 7862ab9cd1cSSteven Whitehouse 7872ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 7882ab9cd1cSSteven Whitehouse return -EPERM; 7892ab9cd1cSSteven Whitehouse 7900a305e49SBob Peterson error = gfs2_rs_alloc(dip); 7910a305e49SBob Peterson if (error) 7920a305e49SBob Peterson return error; 7930a305e49SBob Peterson 7942ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 7952ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 7962ab9cd1cSSteven Whitehouse 7972ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 7982ab9cd1cSSteven Whitehouse if (error) 7992ab9cd1cSSteven Whitehouse goto out_parent; 8002ab9cd1cSSteven Whitehouse 8012ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 8022ab9cd1cSSteven Whitehouse if (error) 8032ab9cd1cSSteven Whitehouse goto out_child; 8042ab9cd1cSSteven Whitehouse 8052ab9cd1cSSteven Whitehouse error = -ENOENT; 8062ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 8072ab9cd1cSSteven Whitehouse goto out_gunlock; 8082ab9cd1cSSteven Whitehouse 80910556cb2SAl Viro error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 8102ab9cd1cSSteven Whitehouse if (error) 8112ab9cd1cSSteven Whitehouse goto out_gunlock; 8122ab9cd1cSSteven Whitehouse 8132ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 8142ab9cd1cSSteven Whitehouse switch (error) { 8152ab9cd1cSSteven Whitehouse case -ENOENT: 8162ab9cd1cSSteven Whitehouse break; 8172ab9cd1cSSteven Whitehouse case 0: 8182ab9cd1cSSteven Whitehouse error = -EEXIST; 8192ab9cd1cSSteven Whitehouse default: 8202ab9cd1cSSteven Whitehouse goto out_gunlock; 8212ab9cd1cSSteven Whitehouse } 8222ab9cd1cSSteven Whitehouse 8232ab9cd1cSSteven Whitehouse error = -EINVAL; 8242ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 8252ab9cd1cSSteven Whitehouse goto out_gunlock; 8262ab9cd1cSSteven Whitehouse error = -EFBIG; 8272ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 8282ab9cd1cSSteven Whitehouse goto out_gunlock; 8292ab9cd1cSSteven Whitehouse error = -EPERM; 8302ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 8312ab9cd1cSSteven Whitehouse goto out_gunlock; 8322ab9cd1cSSteven Whitehouse error = -EINVAL; 8332ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 8342ab9cd1cSSteven Whitehouse goto out_gunlock; 8352ab9cd1cSSteven Whitehouse error = -EMLINK; 8362ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 8372ab9cd1cSSteven Whitehouse goto out_gunlock; 8382ab9cd1cSSteven Whitehouse 8392ab9cd1cSSteven Whitehouse alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); 8402ab9cd1cSSteven Whitehouse if (error < 0) 8412ab9cd1cSSteven Whitehouse goto out_gunlock; 8422ab9cd1cSSteven Whitehouse error = 0; 8432ab9cd1cSSteven Whitehouse 8442ab9cd1cSSteven Whitehouse if (alloc_required) { 8452ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(dip); 8462ab9cd1cSSteven Whitehouse if (error) 8475407e242SBob Peterson goto out_gunlock; 8482ab9cd1cSSteven Whitehouse 8499dbe9610SSteven Whitehouse error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0); 8502ab9cd1cSSteven Whitehouse if (error) 8512ab9cd1cSSteven Whitehouse goto out_gunlock_q; 8522ab9cd1cSSteven Whitehouse 8532ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 85471f890f7SSteven Whitehouse gfs2_rg_blocks(dip, sdp->sd_max_dirres) + 8552ab9cd1cSSteven Whitehouse 2 * RES_DINODE + RES_STATFS + 8562ab9cd1cSSteven Whitehouse RES_QUOTA, 0); 8572ab9cd1cSSteven Whitehouse if (error) 8582ab9cd1cSSteven Whitehouse goto out_ipres; 8592ab9cd1cSSteven Whitehouse } else { 8602ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 8612ab9cd1cSSteven Whitehouse if (error) 8622ab9cd1cSSteven Whitehouse goto out_ipres; 8632ab9cd1cSSteven Whitehouse } 8642ab9cd1cSSteven Whitehouse 8652ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 8662ab9cd1cSSteven Whitehouse if (error) 8672ab9cd1cSSteven Whitehouse goto out_end_trans; 8682ab9cd1cSSteven Whitehouse 8692ab9cd1cSSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip); 8702ab9cd1cSSteven Whitehouse if (error) 8712ab9cd1cSSteven Whitehouse goto out_brelse; 8722ab9cd1cSSteven Whitehouse 873350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 8742ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 8752ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 876ab9bbda0SSteven Whitehouse ihold(inode); 877ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 878ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 8792ab9cd1cSSteven Whitehouse 8802ab9cd1cSSteven Whitehouse out_brelse: 8812ab9cd1cSSteven Whitehouse brelse(dibh); 8822ab9cd1cSSteven Whitehouse out_end_trans: 8832ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 8842ab9cd1cSSteven Whitehouse out_ipres: 8852ab9cd1cSSteven Whitehouse if (alloc_required) 8862ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 8872ab9cd1cSSteven Whitehouse out_gunlock_q: 8882ab9cd1cSSteven Whitehouse if (alloc_required) 8892ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 8902ab9cd1cSSteven Whitehouse out_gunlock: 8912ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 8922ab9cd1cSSteven Whitehouse out_child: 8932ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 8942ab9cd1cSSteven Whitehouse out_parent: 8952ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 8962ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 8972ab9cd1cSSteven Whitehouse return error; 8982ab9cd1cSSteven Whitehouse } 8992ab9cd1cSSteven Whitehouse 9002ab9cd1cSSteven Whitehouse /* 9012ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 9022ab9cd1cSSteven Whitehouse * @dip: the directory 9032ab9cd1cSSteven Whitehouse * @name: the name of the file 9042ab9cd1cSSteven Whitehouse * @ip: the inode 9052ab9cd1cSSteven Whitehouse * 9062ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 9072ab9cd1cSSteven Whitehouse * 9082ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 9092ab9cd1cSSteven Whitehouse */ 9102ab9cd1cSSteven Whitehouse 9112ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 9122ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 9132ab9cd1cSSteven Whitehouse { 9142ab9cd1cSSteven Whitehouse int error; 9152ab9cd1cSSteven Whitehouse 9162ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 9172ab9cd1cSSteven Whitehouse return -EPERM; 9182ab9cd1cSSteven Whitehouse 9192ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 9206b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 9216b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 9222ab9cd1cSSteven Whitehouse return -EPERM; 9232ab9cd1cSSteven Whitehouse 9242ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 9252ab9cd1cSSteven Whitehouse return -EPERM; 9262ab9cd1cSSteven Whitehouse 92710556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 9282ab9cd1cSSteven Whitehouse if (error) 9292ab9cd1cSSteven Whitehouse return error; 9302ab9cd1cSSteven Whitehouse 9312ab9cd1cSSteven Whitehouse error = gfs2_dir_check(&dip->i_inode, name, ip); 9322ab9cd1cSSteven Whitehouse if (error) 9332ab9cd1cSSteven Whitehouse return error; 9342ab9cd1cSSteven Whitehouse 9352ab9cd1cSSteven Whitehouse return 0; 9362ab9cd1cSSteven Whitehouse } 9372ab9cd1cSSteven Whitehouse 9382ab9cd1cSSteven Whitehouse /** 9392ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 9402ab9cd1cSSteven Whitehouse * @dip: The parent directory 9412ab9cd1cSSteven Whitehouse * @name: The name of the entry in the parent directory 9422ab9cd1cSSteven Whitehouse * @inode: The inode to be removed 9432ab9cd1cSSteven Whitehouse * 9442ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 9452ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 9462ab9cd1cSSteven Whitehouse * 9472ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 9482ab9cd1cSSteven Whitehouse */ 9492ab9cd1cSSteven Whitehouse 9502ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 9514327a9bfSBob Peterson const struct dentry *dentry) 9522ab9cd1cSSteven Whitehouse { 9532ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 9542ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9552ab9cd1cSSteven Whitehouse int error; 9562ab9cd1cSSteven Whitehouse 9572ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 9582ab9cd1cSSteven Whitehouse if (error) 9592ab9cd1cSSteven Whitehouse return error; 9602ab9cd1cSSteven Whitehouse 9612ab9cd1cSSteven Whitehouse ip->i_entries = 0; 9622ab9cd1cSSteven Whitehouse inode->i_ctime = CURRENT_TIME; 9632ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9642ab9cd1cSSteven Whitehouse clear_nlink(inode); 9652ab9cd1cSSteven Whitehouse else 9662ab9cd1cSSteven Whitehouse drop_nlink(inode); 9672ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 9682ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9692ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 9702ab9cd1cSSteven Whitehouse return 0; 9712ab9cd1cSSteven Whitehouse } 9722ab9cd1cSSteven Whitehouse 9732ab9cd1cSSteven Whitehouse 9742ab9cd1cSSteven Whitehouse /** 9752ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 9762ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 9772ab9cd1cSSteven Whitehouse * @dentry: The file itself 9782ab9cd1cSSteven Whitehouse * 9792ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 9802ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 9812ab9cd1cSSteven Whitehouse * 9822ab9cd1cSSteven Whitehouse * Returns: errno 9832ab9cd1cSSteven Whitehouse */ 9842ab9cd1cSSteven Whitehouse 9852ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 9862ab9cd1cSSteven Whitehouse { 9872ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9882ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9892ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 9902ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9912ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 9922ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 9935e2f7d61SBob Peterson int error; 9945e2f7d61SBob Peterson 9955e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 9965e2f7d61SBob Peterson if (error) 9975e2f7d61SBob Peterson return error; 9985e2f7d61SBob Peterson 9995e2f7d61SBob Peterson error = -EROFS; 10002ab9cd1cSSteven Whitehouse 10012ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 10022ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 10032ab9cd1cSSteven Whitehouse 100466fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1005a365fbf3SSteven Whitehouse if (!rgd) 100687654896SSteven Whitehouse goto out_inodes; 1007a365fbf3SSteven Whitehouse 10082ab9cd1cSSteven Whitehouse gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 10092ab9cd1cSSteven Whitehouse 10102ab9cd1cSSteven Whitehouse 10112ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 10122ab9cd1cSSteven Whitehouse if (error) 10132ab9cd1cSSteven Whitehouse goto out_parent; 10142ab9cd1cSSteven Whitehouse 10152ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 10162ab9cd1cSSteven Whitehouse if (error) 10172ab9cd1cSSteven Whitehouse goto out_child; 10182ab9cd1cSSteven Whitehouse 10192ab9cd1cSSteven Whitehouse error = -ENOENT; 10202ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 10212ab9cd1cSSteven Whitehouse goto out_rgrp; 10222ab9cd1cSSteven Whitehouse 10232ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 10242ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 10252ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 10262ab9cd1cSSteven Whitehouse goto out_rgrp; 10272ab9cd1cSSteven Whitehouse } 10282ab9cd1cSSteven Whitehouse 10292ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 10302ab9cd1cSSteven Whitehouse if (error) 10312ab9cd1cSSteven Whitehouse goto out_rgrp; 10322ab9cd1cSSteven Whitehouse 10332ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 10342ab9cd1cSSteven Whitehouse if (error) 10352ab9cd1cSSteven Whitehouse goto out_gunlock; 10362ab9cd1cSSteven Whitehouse 10372ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 10382ab9cd1cSSteven Whitehouse if (error) 10392ab9cd1cSSteven Whitehouse goto out_end_trans; 10402ab9cd1cSSteven Whitehouse 10414327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 10422ab9cd1cSSteven Whitehouse 10432ab9cd1cSSteven Whitehouse out_end_trans: 10442ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10452ab9cd1cSSteven Whitehouse out_gunlock: 10462ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 10472ab9cd1cSSteven Whitehouse out_rgrp: 10482ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10492ab9cd1cSSteven Whitehouse out_child: 10502ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10512ab9cd1cSSteven Whitehouse out_parent: 105287654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 105387654896SSteven Whitehouse out_inodes: 105487654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10552ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10562ab9cd1cSSteven Whitehouse return error; 10572ab9cd1cSSteven Whitehouse } 10582ab9cd1cSSteven Whitehouse 10592ab9cd1cSSteven Whitehouse /** 10602ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 10612ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 10622ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 10632ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 10642ab9cd1cSSteven Whitehouse * 10652ab9cd1cSSteven Whitehouse * Returns: errno 10662ab9cd1cSSteven Whitehouse */ 10672ab9cd1cSSteven Whitehouse 10682ab9cd1cSSteven Whitehouse static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 10692ab9cd1cSSteven Whitehouse const char *symname) 10702ab9cd1cSSteven Whitehouse { 10712ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 1072160b4026SSteven Whitehouse unsigned int size; 10732ab9cd1cSSteven Whitehouse 10742ab9cd1cSSteven Whitehouse size = strlen(symname); 10752ab9cd1cSSteven Whitehouse if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) 10762ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 10772ab9cd1cSSteven Whitehouse 10789a63edd1SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 10792ab9cd1cSSteven Whitehouse } 10802ab9cd1cSSteven Whitehouse 10812ab9cd1cSSteven Whitehouse /** 10822ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 10832ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 10842ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 10852ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 10862ab9cd1cSSteven Whitehouse * 10872ab9cd1cSSteven Whitehouse * Returns: errno 10882ab9cd1cSSteven Whitehouse */ 10892ab9cd1cSSteven Whitehouse 109018bb1db3SAl Viro static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 10912ab9cd1cSSteven Whitehouse { 109228fb3027SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 109328fb3027SSteven Whitehouse unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); 109428fb3027SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, dsize, 0); 10952ab9cd1cSSteven Whitehouse } 10962ab9cd1cSSteven Whitehouse 10972ab9cd1cSSteven Whitehouse /** 10982ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 10992ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 11002ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 11012ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1102f2741d98SSteven Whitehouse * @dev: The device specification of the special file 11032ab9cd1cSSteven Whitehouse * 11042ab9cd1cSSteven Whitehouse */ 11052ab9cd1cSSteven Whitehouse 11061a67aafbSAl Viro static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 11072ab9cd1cSSteven Whitehouse dev_t dev) 11082ab9cd1cSSteven Whitehouse { 11099a63edd1SSteven Whitehouse return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0, 0); 11102ab9cd1cSSteven Whitehouse } 11112ab9cd1cSSteven Whitehouse 11122ab9cd1cSSteven Whitehouse /* 11132ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 11142ab9cd1cSSteven Whitehouse * @this: move this 11152ab9cd1cSSteven Whitehouse * @to: to here 11162ab9cd1cSSteven Whitehouse * 11172ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 11182ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 11192ab9cd1cSSteven Whitehouse * 11202ab9cd1cSSteven Whitehouse * Returns: errno 11212ab9cd1cSSteven Whitehouse */ 11222ab9cd1cSSteven Whitehouse 11232ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 11242ab9cd1cSSteven Whitehouse { 11252ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 11262ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 11272ab9cd1cSSteven Whitehouse struct inode *tmp; 11282ab9cd1cSSteven Whitehouse int error = 0; 11292ab9cd1cSSteven Whitehouse 11302ab9cd1cSSteven Whitehouse igrab(dir); 11312ab9cd1cSSteven Whitehouse 11322ab9cd1cSSteven Whitehouse for (;;) { 11332ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 11342ab9cd1cSSteven Whitehouse error = -EINVAL; 11352ab9cd1cSSteven Whitehouse break; 11362ab9cd1cSSteven Whitehouse } 11372ab9cd1cSSteven Whitehouse if (dir == sb->s_root->d_inode) { 11382ab9cd1cSSteven Whitehouse error = 0; 11392ab9cd1cSSteven Whitehouse break; 11402ab9cd1cSSteven Whitehouse } 11412ab9cd1cSSteven Whitehouse 11422ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 11432ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 11442ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 11452ab9cd1cSSteven Whitehouse break; 11462ab9cd1cSSteven Whitehouse } 11472ab9cd1cSSteven Whitehouse 11482ab9cd1cSSteven Whitehouse iput(dir); 11492ab9cd1cSSteven Whitehouse dir = tmp; 11502ab9cd1cSSteven Whitehouse } 11512ab9cd1cSSteven Whitehouse 11522ab9cd1cSSteven Whitehouse iput(dir); 11532ab9cd1cSSteven Whitehouse 11542ab9cd1cSSteven Whitehouse return error; 11552ab9cd1cSSteven Whitehouse } 11562ab9cd1cSSteven Whitehouse 11572ab9cd1cSSteven Whitehouse /** 11582ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 11592ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 11602ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 11612ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 11622ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 11632ab9cd1cSSteven Whitehouse * 11642ab9cd1cSSteven Whitehouse * Returns: errno 11652ab9cd1cSSteven Whitehouse */ 11662ab9cd1cSSteven Whitehouse 11672ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 11682ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 11692ab9cd1cSSteven Whitehouse { 11702ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 11712ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 11722ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(odentry->d_inode); 11732ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 11742ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 11758339ee54SSteven Whitehouse struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; 11762ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 11772ab9cd1cSSteven Whitehouse unsigned int num_gh; 11782ab9cd1cSSteven Whitehouse int dir_rename = 0; 11792ab9cd1cSSteven Whitehouse int alloc_required = 0; 11802ab9cd1cSSteven Whitehouse unsigned int x; 11812ab9cd1cSSteven Whitehouse int error; 11822ab9cd1cSSteven Whitehouse 11832ab9cd1cSSteven Whitehouse if (ndentry->d_inode) { 11842ab9cd1cSSteven Whitehouse nip = GFS2_I(ndentry->d_inode); 11852ab9cd1cSSteven Whitehouse if (ip == nip) 11862ab9cd1cSSteven Whitehouse return 0; 11872ab9cd1cSSteven Whitehouse } 11882ab9cd1cSSteven Whitehouse 11895e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11905e2f7d61SBob Peterson if (error) 11915e2f7d61SBob Peterson return error; 11925e2f7d61SBob Peterson 11930a305e49SBob Peterson error = gfs2_rs_alloc(ndip); 11940a305e49SBob Peterson if (error) 11950a305e49SBob Peterson return error; 11960a305e49SBob Peterson 11972ab9cd1cSSteven Whitehouse if (odip != ndip) { 11982ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 11992ab9cd1cSSteven Whitehouse 0, &r_gh); 12002ab9cd1cSSteven Whitehouse if (error) 12012ab9cd1cSSteven Whitehouse goto out; 12022ab9cd1cSSteven Whitehouse 12032ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 12042ab9cd1cSSteven Whitehouse dir_rename = 1; 12052ab9cd1cSSteven Whitehouse /* don't move a dirctory into it's subdir */ 12062ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 12072ab9cd1cSSteven Whitehouse if (error) 12082ab9cd1cSSteven Whitehouse goto out_gunlock_r; 12092ab9cd1cSSteven Whitehouse } 12102ab9cd1cSSteven Whitehouse } 12112ab9cd1cSSteven Whitehouse 12122ab9cd1cSSteven Whitehouse num_gh = 1; 12132ab9cd1cSSteven Whitehouse gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 12142ab9cd1cSSteven Whitehouse if (odip != ndip) { 12152ab9cd1cSSteven Whitehouse gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12162ab9cd1cSSteven Whitehouse num_gh++; 12172ab9cd1cSSteven Whitehouse } 12182ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12192ab9cd1cSSteven Whitehouse num_gh++; 12202ab9cd1cSSteven Whitehouse 12212ab9cd1cSSteven Whitehouse if (nip) { 12222ab9cd1cSSteven Whitehouse gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12232ab9cd1cSSteven Whitehouse num_gh++; 12242ab9cd1cSSteven Whitehouse /* grab the resource lock for unlink flag twiddling 12252ab9cd1cSSteven Whitehouse * this is the case of the target file already existing 12262ab9cd1cSSteven Whitehouse * so we unlink before doing the rename 12272ab9cd1cSSteven Whitehouse */ 122866fc061bSSteven Whitehouse nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 12292ab9cd1cSSteven Whitehouse if (nrgd) 12302ab9cd1cSSteven Whitehouse gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 12312ab9cd1cSSteven Whitehouse } 12322ab9cd1cSSteven Whitehouse 12332ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 12342ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 12352ab9cd1cSSteven Whitehouse if (error) 12362ab9cd1cSSteven Whitehouse goto out_gunlock; 12372ab9cd1cSSteven Whitehouse } 12382ab9cd1cSSteven Whitehouse 12392ab9cd1cSSteven Whitehouse error = -ENOENT; 12402ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 12412ab9cd1cSSteven Whitehouse goto out_gunlock; 12422ab9cd1cSSteven Whitehouse 12432ab9cd1cSSteven Whitehouse /* Check out the old directory */ 12442ab9cd1cSSteven Whitehouse 12452ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 12462ab9cd1cSSteven Whitehouse if (error) 12472ab9cd1cSSteven Whitehouse goto out_gunlock; 12482ab9cd1cSSteven Whitehouse 12492ab9cd1cSSteven Whitehouse /* Check out the new directory */ 12502ab9cd1cSSteven Whitehouse 12512ab9cd1cSSteven Whitehouse if (nip) { 12522ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 12532ab9cd1cSSteven Whitehouse if (error) 12542ab9cd1cSSteven Whitehouse goto out_gunlock; 12552ab9cd1cSSteven Whitehouse 12562ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 12572ab9cd1cSSteven Whitehouse error = -EAGAIN; 12582ab9cd1cSSteven Whitehouse goto out_gunlock; 12592ab9cd1cSSteven Whitehouse } 12602ab9cd1cSSteven Whitehouse 12612ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 12622ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 12632ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 12642ab9cd1cSSteven Whitehouse error = -EIO; 12652ab9cd1cSSteven Whitehouse goto out_gunlock; 12662ab9cd1cSSteven Whitehouse } 12672ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 12682ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 12692ab9cd1cSSteven Whitehouse goto out_gunlock; 12702ab9cd1cSSteven Whitehouse } 12712ab9cd1cSSteven Whitehouse } 12722ab9cd1cSSteven Whitehouse } else { 127310556cb2SAl Viro error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 12742ab9cd1cSSteven Whitehouse if (error) 12752ab9cd1cSSteven Whitehouse goto out_gunlock; 12762ab9cd1cSSteven Whitehouse 12772ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 12782ab9cd1cSSteven Whitehouse switch (error) { 12792ab9cd1cSSteven Whitehouse case -ENOENT: 12802ab9cd1cSSteven Whitehouse error = 0; 12812ab9cd1cSSteven Whitehouse break; 12822ab9cd1cSSteven Whitehouse case 0: 12832ab9cd1cSSteven Whitehouse error = -EEXIST; 12842ab9cd1cSSteven Whitehouse default: 12852ab9cd1cSSteven Whitehouse goto out_gunlock; 12862ab9cd1cSSteven Whitehouse }; 12872ab9cd1cSSteven Whitehouse 12882ab9cd1cSSteven Whitehouse if (odip != ndip) { 12892ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 12902ab9cd1cSSteven Whitehouse error = -ENOENT; 12912ab9cd1cSSteven Whitehouse goto out_gunlock; 12922ab9cd1cSSteven Whitehouse } 12932ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 12942ab9cd1cSSteven Whitehouse error = -EFBIG; 12952ab9cd1cSSteven Whitehouse goto out_gunlock; 12962ab9cd1cSSteven Whitehouse } 12972ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 12982ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 12992ab9cd1cSSteven Whitehouse error = -EMLINK; 13002ab9cd1cSSteven Whitehouse goto out_gunlock; 13012ab9cd1cSSteven Whitehouse } 13022ab9cd1cSSteven Whitehouse } 13032ab9cd1cSSteven Whitehouse } 13042ab9cd1cSSteven Whitehouse 13052ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 13062ab9cd1cSSteven Whitehouse 13072ab9cd1cSSteven Whitehouse if (dir_rename) { 130810556cb2SAl Viro error = gfs2_permission(odentry->d_inode, MAY_WRITE); 13092ab9cd1cSSteven Whitehouse if (error) 13102ab9cd1cSSteven Whitehouse goto out_gunlock; 13112ab9cd1cSSteven Whitehouse } 13122ab9cd1cSSteven Whitehouse 13132ab9cd1cSSteven Whitehouse if (nip == NULL) 13142ab9cd1cSSteven Whitehouse alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); 13152ab9cd1cSSteven Whitehouse error = alloc_required; 13162ab9cd1cSSteven Whitehouse if (error < 0) 13172ab9cd1cSSteven Whitehouse goto out_gunlock; 13182ab9cd1cSSteven Whitehouse 13192ab9cd1cSSteven Whitehouse if (alloc_required) { 13202ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(ndip); 13212ab9cd1cSSteven Whitehouse if (error) 13225407e242SBob Peterson goto out_gunlock; 13232ab9cd1cSSteven Whitehouse 13249dbe9610SSteven Whitehouse error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres, 0); 13252ab9cd1cSSteven Whitehouse if (error) 13262ab9cd1cSSteven Whitehouse goto out_gunlock_q; 13272ab9cd1cSSteven Whitehouse 13282ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 132971f890f7SSteven Whitehouse gfs2_rg_blocks(ndip, sdp->sd_max_dirres) + 13302ab9cd1cSSteven Whitehouse 4 * RES_DINODE + 4 * RES_LEAF + 13312ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA + 4, 0); 13322ab9cd1cSSteven Whitehouse if (error) 13332ab9cd1cSSteven Whitehouse goto out_ipreserv; 13342ab9cd1cSSteven Whitehouse } else { 13352ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 13362ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 13372ab9cd1cSSteven Whitehouse if (error) 13382ab9cd1cSSteven Whitehouse goto out_gunlock; 13392ab9cd1cSSteven Whitehouse } 13402ab9cd1cSSteven Whitehouse 13412ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 13422ab9cd1cSSteven Whitehouse 13434327a9bfSBob Peterson if (nip) 13444327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 13452ab9cd1cSSteven Whitehouse 13462ab9cd1cSSteven Whitehouse if (dir_rename) { 13472ab9cd1cSSteven Whitehouse error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 13482ab9cd1cSSteven Whitehouse if (error) 13492ab9cd1cSSteven Whitehouse goto out_end_trans; 13502ab9cd1cSSteven Whitehouse } else { 13512ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 13522ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 13532ab9cd1cSSteven Whitehouse if (error) 13542ab9cd1cSSteven Whitehouse goto out_end_trans; 13552ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 1356350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 13572ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 13582ab9cd1cSSteven Whitehouse brelse(dibh); 13592ab9cd1cSSteven Whitehouse } 13602ab9cd1cSSteven Whitehouse 13612ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 13622ab9cd1cSSteven Whitehouse if (error) 13632ab9cd1cSSteven Whitehouse goto out_end_trans; 13642ab9cd1cSSteven Whitehouse 13652ab9cd1cSSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip); 13662ab9cd1cSSteven Whitehouse if (error) 13672ab9cd1cSSteven Whitehouse goto out_end_trans; 13682ab9cd1cSSteven Whitehouse 13692ab9cd1cSSteven Whitehouse out_end_trans: 13702ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 13712ab9cd1cSSteven Whitehouse out_ipreserv: 13722ab9cd1cSSteven Whitehouse if (alloc_required) 13732ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 13742ab9cd1cSSteven Whitehouse out_gunlock_q: 13752ab9cd1cSSteven Whitehouse if (alloc_required) 13762ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 13772ab9cd1cSSteven Whitehouse out_gunlock: 13782ab9cd1cSSteven Whitehouse while (x--) { 13792ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 13802ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 13812ab9cd1cSSteven Whitehouse } 13822ab9cd1cSSteven Whitehouse out_gunlock_r: 13832ab9cd1cSSteven Whitehouse if (r_gh.gh_gl) 13842ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 13852ab9cd1cSSteven Whitehouse out: 13862ab9cd1cSSteven Whitehouse return error; 13872ab9cd1cSSteven Whitehouse } 13882ab9cd1cSSteven Whitehouse 13892ab9cd1cSSteven Whitehouse /** 13902ab9cd1cSSteven Whitehouse * gfs2_follow_link - Follow a symbolic link 13912ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 13922ab9cd1cSSteven Whitehouse * @nd: Data that we pass to vfs_follow_link() 13932ab9cd1cSSteven Whitehouse * 13942ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 13952ab9cd1cSSteven Whitehouse * 13962ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 13972ab9cd1cSSteven Whitehouse */ 13982ab9cd1cSSteven Whitehouse 13992ab9cd1cSSteven Whitehouse static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) 14002ab9cd1cSSteven Whitehouse { 14012ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(dentry->d_inode); 14022ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 14032ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1404160b4026SSteven Whitehouse unsigned int size; 14052ab9cd1cSSteven Whitehouse char *buf; 14062ab9cd1cSSteven Whitehouse int error; 14072ab9cd1cSSteven Whitehouse 14082ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 14092ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 14102ab9cd1cSSteven Whitehouse if (error) { 14112ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 14122ab9cd1cSSteven Whitehouse nd_set_link(nd, ERR_PTR(error)); 14132ab9cd1cSSteven Whitehouse return NULL; 14142ab9cd1cSSteven Whitehouse } 14152ab9cd1cSSteven Whitehouse 14162ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 14172ab9cd1cSSteven Whitehouse if (size == 0) { 14182ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 14192ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 14202ab9cd1cSSteven Whitehouse goto out; 14212ab9cd1cSSteven Whitehouse } 14222ab9cd1cSSteven Whitehouse 14232ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 14242ab9cd1cSSteven Whitehouse if (error) { 14252ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 14262ab9cd1cSSteven Whitehouse goto out; 14272ab9cd1cSSteven Whitehouse } 14282ab9cd1cSSteven Whitehouse 1429160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 14302ab9cd1cSSteven Whitehouse if (!buf) 14312ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 14322ab9cd1cSSteven Whitehouse else 1433160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 14342ab9cd1cSSteven Whitehouse brelse(dibh); 14352ab9cd1cSSteven Whitehouse out: 14362ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 14372ab9cd1cSSteven Whitehouse nd_set_link(nd, buf); 14382ab9cd1cSSteven Whitehouse return NULL; 14392ab9cd1cSSteven Whitehouse } 14402ab9cd1cSSteven Whitehouse 14412ab9cd1cSSteven Whitehouse static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 14422ab9cd1cSSteven Whitehouse { 14432ab9cd1cSSteven Whitehouse char *s = nd_get_link(nd); 14442ab9cd1cSSteven Whitehouse if (!IS_ERR(s)) 14452ab9cd1cSSteven Whitehouse kfree(s); 14462ab9cd1cSSteven Whitehouse } 14472ab9cd1cSSteven Whitehouse 14482ab9cd1cSSteven Whitehouse /** 14492ab9cd1cSSteven Whitehouse * gfs2_permission - 14502ab9cd1cSSteven Whitehouse * @inode: The inode 14512ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 14522ab9cd1cSSteven Whitehouse * @flags: Indicates whether this is an RCU path walk or not 14532ab9cd1cSSteven Whitehouse * 14542ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 14552ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 14562ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 14572ab9cd1cSSteven Whitehouse * 14582ab9cd1cSSteven Whitehouse * Returns: errno 14592ab9cd1cSSteven Whitehouse */ 14602ab9cd1cSSteven Whitehouse 146110556cb2SAl Viro int gfs2_permission(struct inode *inode, int mask) 14622ab9cd1cSSteven Whitehouse { 14632ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 14642ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 14652ab9cd1cSSteven Whitehouse int error; 14662ab9cd1cSSteven Whitehouse int unlock = 0; 14672ab9cd1cSSteven Whitehouse 14682ab9cd1cSSteven Whitehouse 14692ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 14702ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 147110556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 14722ab9cd1cSSteven Whitehouse return -ECHILD; 14732ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 14742ab9cd1cSSteven Whitehouse if (error) 14752ab9cd1cSSteven Whitehouse return error; 14762ab9cd1cSSteven Whitehouse unlock = 1; 14772ab9cd1cSSteven Whitehouse } 14782ab9cd1cSSteven Whitehouse 14792ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 14802ab9cd1cSSteven Whitehouse error = -EACCES; 14812ab9cd1cSSteven Whitehouse else 14822830ba7fSAl Viro error = generic_permission(inode, mask); 14832ab9cd1cSSteven Whitehouse if (unlock) 14842ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 14852ab9cd1cSSteven Whitehouse 14862ab9cd1cSSteven Whitehouse return error; 14872ab9cd1cSSteven Whitehouse } 14882ab9cd1cSSteven Whitehouse 1489ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 14902ab9cd1cSSteven Whitehouse { 14912ab9cd1cSSteven Whitehouse setattr_copy(inode, attr); 14922ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 14932ab9cd1cSSteven Whitehouse return 0; 14942ab9cd1cSSteven Whitehouse } 14952ab9cd1cSSteven Whitehouse 14962ab9cd1cSSteven Whitehouse /** 14972ab9cd1cSSteven Whitehouse * gfs2_setattr_simple - 14982ab9cd1cSSteven Whitehouse * @ip: 14992ab9cd1cSSteven Whitehouse * @attr: 15002ab9cd1cSSteven Whitehouse * 15012ab9cd1cSSteven Whitehouse * Returns: errno 15022ab9cd1cSSteven Whitehouse */ 15032ab9cd1cSSteven Whitehouse 1504ab9bbda0SSteven Whitehouse int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 15052ab9cd1cSSteven Whitehouse { 15062ab9cd1cSSteven Whitehouse int error; 15072ab9cd1cSSteven Whitehouse 15082ab9cd1cSSteven Whitehouse if (current->journal_info) 1509ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 15102ab9cd1cSSteven Whitehouse 1511ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 15122ab9cd1cSSteven Whitehouse if (error) 15132ab9cd1cSSteven Whitehouse return error; 15142ab9cd1cSSteven Whitehouse 1515ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1516ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 15172ab9cd1cSSteven Whitehouse return error; 15182ab9cd1cSSteven Whitehouse } 15192ab9cd1cSSteven Whitehouse 15202ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 15212ab9cd1cSSteven Whitehouse { 15222ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 15232ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 15247c06b5d6SEric W. Biederman kuid_t ouid, nuid; 15257c06b5d6SEric W. Biederman kgid_t ogid, ngid; 15262ab9cd1cSSteven Whitehouse int error; 15272ab9cd1cSSteven Whitehouse 15282ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 15292ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 15302ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 15312ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 15322ab9cd1cSSteven Whitehouse 15336b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1534f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 15356b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1536f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 15372ab9cd1cSSteven Whitehouse 15382ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(ip, nuid, ngid); 15392ab9cd1cSSteven Whitehouse if (error) 15405407e242SBob Peterson return error; 15412ab9cd1cSSteven Whitehouse 15426b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 15436b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 15442ab9cd1cSSteven Whitehouse error = gfs2_quota_check(ip, nuid, ngid); 15452ab9cd1cSSteven Whitehouse if (error) 15462ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15472ab9cd1cSSteven Whitehouse } 15482ab9cd1cSSteven Whitehouse 15492ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 15502ab9cd1cSSteven Whitehouse if (error) 15512ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15522ab9cd1cSSteven Whitehouse 1553ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 15542ab9cd1cSSteven Whitehouse if (error) 15552ab9cd1cSSteven Whitehouse goto out_end_trans; 15562ab9cd1cSSteven Whitehouse 15576b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 15586b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 15592ab9cd1cSSteven Whitehouse u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); 15602ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, -blocks, ouid, ogid); 15612ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, blocks, nuid, ngid); 15622ab9cd1cSSteven Whitehouse } 15632ab9cd1cSSteven Whitehouse 15642ab9cd1cSSteven Whitehouse out_end_trans: 15652ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 15662ab9cd1cSSteven Whitehouse out_gunlock_q: 15672ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 15682ab9cd1cSSteven Whitehouse return error; 15692ab9cd1cSSteven Whitehouse } 15702ab9cd1cSSteven Whitehouse 15712ab9cd1cSSteven Whitehouse /** 15722ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 15732ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 15742ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 15752ab9cd1cSSteven Whitehouse * 15762ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 15772ab9cd1cSSteven Whitehouse * that change out to disk. 15782ab9cd1cSSteven Whitehouse * 15792ab9cd1cSSteven Whitehouse * Returns: errno 15802ab9cd1cSSteven Whitehouse */ 15812ab9cd1cSSteven Whitehouse 15822ab9cd1cSSteven Whitehouse static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 15832ab9cd1cSSteven Whitehouse { 15842ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 15852ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 15862ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 15872ab9cd1cSSteven Whitehouse int error; 15882ab9cd1cSSteven Whitehouse 15890a305e49SBob Peterson error = gfs2_rs_alloc(ip); 15900a305e49SBob Peterson if (error) 15910a305e49SBob Peterson return error; 15920a305e49SBob Peterson 15932ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 15942ab9cd1cSSteven Whitehouse if (error) 15952ab9cd1cSSteven Whitehouse return error; 15962ab9cd1cSSteven Whitehouse 15972ab9cd1cSSteven Whitehouse error = -EPERM; 15982ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 15992ab9cd1cSSteven Whitehouse goto out; 16002ab9cd1cSSteven Whitehouse 16012ab9cd1cSSteven Whitehouse error = inode_change_ok(inode, attr); 16022ab9cd1cSSteven Whitehouse if (error) 16032ab9cd1cSSteven Whitehouse goto out; 16042ab9cd1cSSteven Whitehouse 16052ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 16062ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 16072ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 16082ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 16092ab9cd1cSSteven Whitehouse else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) 16102ab9cd1cSSteven Whitehouse error = gfs2_acl_chmod(ip, attr); 16112ab9cd1cSSteven Whitehouse else 1612ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 16132ab9cd1cSSteven Whitehouse 16142ab9cd1cSSteven Whitehouse out: 16152ab9cd1cSSteven Whitehouse if (!error) 16162ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 1617ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 16182ab9cd1cSSteven Whitehouse return error; 16192ab9cd1cSSteven Whitehouse } 16202ab9cd1cSSteven Whitehouse 16212ab9cd1cSSteven Whitehouse /** 16222ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 16232ab9cd1cSSteven Whitehouse * @mnt: The vfsmount the inode is being accessed from 16242ab9cd1cSSteven Whitehouse * @dentry: The dentry to stat 16252ab9cd1cSSteven Whitehouse * @stat: The inode's stats 16262ab9cd1cSSteven Whitehouse * 16272ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 16282ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 16292ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 16302ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 16312ab9cd1cSSteven Whitehouse * with the glock already held. 16322ab9cd1cSSteven Whitehouse * 16332ab9cd1cSSteven Whitehouse * Returns: errno 16342ab9cd1cSSteven Whitehouse */ 16352ab9cd1cSSteven Whitehouse 16362ab9cd1cSSteven Whitehouse static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, 16372ab9cd1cSSteven Whitehouse struct kstat *stat) 16382ab9cd1cSSteven Whitehouse { 16392ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 16402ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16412ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 16422ab9cd1cSSteven Whitehouse int error; 16432ab9cd1cSSteven Whitehouse int unlock = 0; 16442ab9cd1cSSteven Whitehouse 16452ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 16462ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 16472ab9cd1cSSteven Whitehouse if (error) 16482ab9cd1cSSteven Whitehouse return error; 16492ab9cd1cSSteven Whitehouse unlock = 1; 16502ab9cd1cSSteven Whitehouse } 16512ab9cd1cSSteven Whitehouse 16522ab9cd1cSSteven Whitehouse generic_fillattr(inode, stat); 16532ab9cd1cSSteven Whitehouse if (unlock) 16542ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 16552ab9cd1cSSteven Whitehouse 16562ab9cd1cSSteven Whitehouse return 0; 16572ab9cd1cSSteven Whitehouse } 16582ab9cd1cSSteven Whitehouse 16592ab9cd1cSSteven Whitehouse static int gfs2_setxattr(struct dentry *dentry, const char *name, 16602ab9cd1cSSteven Whitehouse const void *data, size_t size, int flags) 16612ab9cd1cSSteven Whitehouse { 16622ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 16632ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16642ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 16652ab9cd1cSSteven Whitehouse int ret; 16662ab9cd1cSSteven Whitehouse 16672ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 16682ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 16692ab9cd1cSSteven Whitehouse if (ret == 0) { 1670645b2cccSSteven Whitehouse ret = gfs2_rs_alloc(ip); 1671645b2cccSSteven Whitehouse if (ret == 0) 16722ab9cd1cSSteven Whitehouse ret = generic_setxattr(dentry, name, data, size, flags); 16732ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 16742ab9cd1cSSteven Whitehouse } 16752ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 16762ab9cd1cSSteven Whitehouse return ret; 16772ab9cd1cSSteven Whitehouse } 16782ab9cd1cSSteven Whitehouse 16792ab9cd1cSSteven Whitehouse static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, 16802ab9cd1cSSteven Whitehouse void *data, size_t size) 16812ab9cd1cSSteven Whitehouse { 16822ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 16832ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16842ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 16852ab9cd1cSSteven Whitehouse int ret; 16862ab9cd1cSSteven Whitehouse 16872ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 16882ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 16892ab9cd1cSSteven Whitehouse if (ret == 0) { 16902ab9cd1cSSteven Whitehouse ret = generic_getxattr(dentry, name, data, size); 16912ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 16922ab9cd1cSSteven Whitehouse } 16932ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 16942ab9cd1cSSteven Whitehouse return ret; 16952ab9cd1cSSteven Whitehouse } 16962ab9cd1cSSteven Whitehouse 16972ab9cd1cSSteven Whitehouse static int gfs2_removexattr(struct dentry *dentry, const char *name) 16982ab9cd1cSSteven Whitehouse { 16992ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17002ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17012ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17022ab9cd1cSSteven Whitehouse int ret; 17032ab9cd1cSSteven Whitehouse 17042ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 17052ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17062ab9cd1cSSteven Whitehouse if (ret == 0) { 1707645b2cccSSteven Whitehouse ret = gfs2_rs_alloc(ip); 1708645b2cccSSteven Whitehouse if (ret == 0) 17092ab9cd1cSSteven Whitehouse ret = generic_removexattr(dentry, name); 17102ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17112ab9cd1cSSteven Whitehouse } 17122ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17132ab9cd1cSSteven Whitehouse return ret; 17142ab9cd1cSSteven Whitehouse } 17152ab9cd1cSSteven Whitehouse 17162ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 17172ab9cd1cSSteven Whitehouse u64 start, u64 len) 17182ab9cd1cSSteven Whitehouse { 17192ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17202ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17212ab9cd1cSSteven Whitehouse int ret; 17222ab9cd1cSSteven Whitehouse 17232ab9cd1cSSteven Whitehouse ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); 17242ab9cd1cSSteven Whitehouse if (ret) 17252ab9cd1cSSteven Whitehouse return ret; 17262ab9cd1cSSteven Whitehouse 17272ab9cd1cSSteven Whitehouse mutex_lock(&inode->i_mutex); 17282ab9cd1cSSteven Whitehouse 17292ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 17302ab9cd1cSSteven Whitehouse if (ret) 17312ab9cd1cSSteven Whitehouse goto out; 17322ab9cd1cSSteven Whitehouse 17332ab9cd1cSSteven Whitehouse if (gfs2_is_stuffed(ip)) { 17342ab9cd1cSSteven Whitehouse u64 phys = ip->i_no_addr << inode->i_blkbits; 17352ab9cd1cSSteven Whitehouse u64 size = i_size_read(inode); 17362ab9cd1cSSteven Whitehouse u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| 17372ab9cd1cSSteven Whitehouse FIEMAP_EXTENT_DATA_INLINE; 17382ab9cd1cSSteven Whitehouse phys += sizeof(struct gfs2_dinode); 17392ab9cd1cSSteven Whitehouse phys += start; 17402ab9cd1cSSteven Whitehouse if (start + len > size) 17412ab9cd1cSSteven Whitehouse len = size - start; 17422ab9cd1cSSteven Whitehouse if (start < size) 17432ab9cd1cSSteven Whitehouse ret = fiemap_fill_next_extent(fieinfo, start, phys, 17442ab9cd1cSSteven Whitehouse len, flags); 17452ab9cd1cSSteven Whitehouse if (ret == 1) 17462ab9cd1cSSteven Whitehouse ret = 0; 17472ab9cd1cSSteven Whitehouse } else { 17482ab9cd1cSSteven Whitehouse ret = __generic_block_fiemap(inode, fieinfo, start, len, 17492ab9cd1cSSteven Whitehouse gfs2_block_map); 17502ab9cd1cSSteven Whitehouse } 17512ab9cd1cSSteven Whitehouse 17522ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 17532ab9cd1cSSteven Whitehouse out: 17542ab9cd1cSSteven Whitehouse mutex_unlock(&inode->i_mutex); 17552ab9cd1cSSteven Whitehouse return ret; 17562ab9cd1cSSteven Whitehouse } 17572ab9cd1cSSteven Whitehouse 17582ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_file_iops = { 17592ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 17602ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 17612ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 17622ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 17632ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 17642ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 17652ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 17662ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 17674e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 17682ab9cd1cSSteven Whitehouse }; 17692ab9cd1cSSteven Whitehouse 17702ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_dir_iops = { 17712ab9cd1cSSteven Whitehouse .create = gfs2_create, 17722ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 17732ab9cd1cSSteven Whitehouse .link = gfs2_link, 17742ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 17752ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 17762ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 17772ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 17782ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 17792ab9cd1cSSteven Whitehouse .rename = gfs2_rename, 17802ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 17812ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 17822ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 17832ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 17842ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 17852ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 17862ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 17872ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 17884e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 17892ab9cd1cSSteven Whitehouse }; 17902ab9cd1cSSteven Whitehouse 17912ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_symlink_iops = { 17922ab9cd1cSSteven Whitehouse .readlink = generic_readlink, 17932ab9cd1cSSteven Whitehouse .follow_link = gfs2_follow_link, 17942ab9cd1cSSteven Whitehouse .put_link = gfs2_put_link, 17952ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 17962ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 17972ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 17982ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 17992ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18002ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18012ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18022ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18034e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18042ab9cd1cSSteven Whitehouse }; 18052ab9cd1cSSteven Whitehouse 1806