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 367175a4eb7SAl Viro static void munge_mode_uid_gid(struct gfs2_inode *dip, umode_t *mode, 3682ab9cd1cSSteven Whitehouse unsigned int *uid, unsigned int *gid) 3692ab9cd1cSSteven Whitehouse { 3702ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3712ab9cd1cSSteven Whitehouse (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { 3722ab9cd1cSSteven Whitehouse if (S_ISDIR(*mode)) 3732ab9cd1cSSteven Whitehouse *mode |= S_ISUID; 3742ab9cd1cSSteven Whitehouse else if (dip->i_inode.i_uid != current_fsuid()) 3752ab9cd1cSSteven Whitehouse *mode &= ~07111; 3762ab9cd1cSSteven Whitehouse *uid = dip->i_inode.i_uid; 3772ab9cd1cSSteven Whitehouse } else 3782ab9cd1cSSteven Whitehouse *uid = current_fsuid(); 3792ab9cd1cSSteven Whitehouse 3802ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 3812ab9cd1cSSteven Whitehouse if (S_ISDIR(*mode)) 3822ab9cd1cSSteven Whitehouse *mode |= S_ISGID; 3832ab9cd1cSSteven Whitehouse *gid = dip->i_inode.i_gid; 3842ab9cd1cSSteven Whitehouse } else 3852ab9cd1cSSteven Whitehouse *gid = current_fsgid(); 3862ab9cd1cSSteven Whitehouse } 3872ab9cd1cSSteven Whitehouse 3882ab9cd1cSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) 3892ab9cd1cSSteven Whitehouse { 3902ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 3912ab9cd1cSSteven Whitehouse int error; 3926a8099edSSteven Whitehouse int dblocks = 1; 3932ab9cd1cSSteven Whitehouse 394564e12b1SBob Peterson error = gfs2_inplace_reserve(dip, RES_DINODE); 3952ab9cd1cSSteven Whitehouse if (error) 3962ab9cd1cSSteven Whitehouse goto out; 3972ab9cd1cSSteven Whitehouse 3982ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); 3992ab9cd1cSSteven Whitehouse if (error) 4002ab9cd1cSSteven Whitehouse goto out_ipreserv; 4012ab9cd1cSSteven Whitehouse 4026e87ed0fSBob Peterson error = gfs2_alloc_blocks(dip, no_addr, &dblocks, 1, generation); 4032ab9cd1cSSteven Whitehouse 4042ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4052ab9cd1cSSteven Whitehouse 4062ab9cd1cSSteven Whitehouse out_ipreserv: 4072ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 4082ab9cd1cSSteven Whitehouse out: 4092ab9cd1cSSteven Whitehouse return error; 4102ab9cd1cSSteven Whitehouse } 4112ab9cd1cSSteven Whitehouse 412f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 413f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 414e2d0a13bSSteven Whitehouse { 415e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 416e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 417e2d0a13bSSteven Whitehouse 418e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 419e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 420e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 421e2d0a13bSSteven Whitehouse 422e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 423e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 424e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 425e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 426e2d0a13bSSteven Whitehouse 427e2d0a13bSSteven Whitehouse } 428e2d0a13bSSteven Whitehouse 4292ab9cd1cSSteven Whitehouse /** 4302ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 431f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 4322ab9cd1cSSteven Whitehouse * @gl: The glock covering the new inode 433f2741d98SSteven Whitehouse * @inum: The inode number 434f2741d98SSteven Whitehouse * @mode: The file permissions 435f2741d98SSteven Whitehouse * @uid: The uid of the new inode 436f2741d98SSteven Whitehouse * @gid: The gid of the new inode 437f2741d98SSteven Whitehouse * @generation: The generation number of the new inode 438f2741d98SSteven Whitehouse * @dev: The device number (if a device node) 439f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 440f2741d98SSteven Whitehouse * @size: The inode size (ignored for directories) 441f2741d98SSteven Whitehouse * @bhp: The buffer head (returned to caller) 4422ab9cd1cSSteven Whitehouse * 4432ab9cd1cSSteven Whitehouse */ 4442ab9cd1cSSteven Whitehouse 4452ab9cd1cSSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, 446175a4eb7SAl Viro const struct gfs2_inum_host *inum, umode_t mode, 4472ab9cd1cSSteven Whitehouse unsigned int uid, unsigned int gid, 448160b4026SSteven Whitehouse const u64 *generation, dev_t dev, const char *symname, 449160b4026SSteven Whitehouse unsigned size, struct buffer_head **bhp) 4502ab9cd1cSSteven Whitehouse { 4512ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 4522ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4532ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4542ab9cd1cSSteven Whitehouse struct timespec tv = CURRENT_TIME; 4552ab9cd1cSSteven Whitehouse 4562ab9cd1cSSteven Whitehouse dibh = gfs2_meta_new(gl, inum->no_addr); 4572ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(gl, dibh, 1); 4582ab9cd1cSSteven Whitehouse gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); 4592ab9cd1cSSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 4602ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 4612ab9cd1cSSteven Whitehouse 4622ab9cd1cSSteven Whitehouse di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); 4632ab9cd1cSSteven Whitehouse di->di_num.no_addr = cpu_to_be64(inum->no_addr); 4642ab9cd1cSSteven Whitehouse di->di_mode = cpu_to_be32(mode); 4652ab9cd1cSSteven Whitehouse di->di_uid = cpu_to_be32(uid); 4662ab9cd1cSSteven Whitehouse di->di_gid = cpu_to_be32(gid); 4672ab9cd1cSSteven Whitehouse di->di_nlink = 0; 468160b4026SSteven Whitehouse di->di_size = cpu_to_be64(size); 4692ab9cd1cSSteven Whitehouse di->di_blocks = cpu_to_be64(1); 4702ab9cd1cSSteven Whitehouse di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); 4712ab9cd1cSSteven Whitehouse di->di_major = cpu_to_be32(MAJOR(dev)); 4722ab9cd1cSSteven Whitehouse di->di_minor = cpu_to_be32(MINOR(dev)); 4732ab9cd1cSSteven Whitehouse di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); 4742ab9cd1cSSteven Whitehouse di->di_generation = cpu_to_be64(*generation); 4752ab9cd1cSSteven Whitehouse di->di_flags = 0; 4762ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4772ab9cd1cSSteven Whitehouse di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); 4782ab9cd1cSSteven Whitehouse di->di_height = 0; 4792ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4802ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4812ab9cd1cSSteven Whitehouse di->di_depth = 0; 4822ab9cd1cSSteven Whitehouse di->di_entries = 0; 4832ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4842ab9cd1cSSteven Whitehouse di->di_eattr = 0; 4852ab9cd1cSSteven Whitehouse di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); 4862ab9cd1cSSteven Whitehouse di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); 4872ab9cd1cSSteven Whitehouse di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); 4882ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 4892ab9cd1cSSteven Whitehouse 490160b4026SSteven Whitehouse switch(mode & S_IFMT) { 491160b4026SSteven Whitehouse case S_IFREG: 492e2d0a13bSSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 493e2d0a13bSSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 494e2d0a13bSSteven Whitehouse di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); 495160b4026SSteven Whitehouse break; 496160b4026SSteven Whitehouse case S_IFDIR: 497e2d0a13bSSteven Whitehouse di->di_flags |= cpu_to_be32(dip->i_diskflags & 498e2d0a13bSSteven Whitehouse GFS2_DIF_INHERIT_JDATA); 499e2d0a13bSSteven Whitehouse di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); 500e2d0a13bSSteven Whitehouse di->di_size = cpu_to_be64(sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)); 501e2d0a13bSSteven Whitehouse di->di_entries = cpu_to_be32(2); 502e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 503160b4026SSteven Whitehouse break; 504160b4026SSteven Whitehouse case S_IFLNK: 505160b4026SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, size); 506160b4026SSteven Whitehouse break; 507e2d0a13bSSteven Whitehouse } 508e2d0a13bSSteven Whitehouse 5092ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 5102ab9cd1cSSteven Whitehouse 5112ab9cd1cSSteven Whitehouse *bhp = dibh; 5122ab9cd1cSSteven Whitehouse } 5132ab9cd1cSSteven Whitehouse 5142ab9cd1cSSteven Whitehouse static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, 515175a4eb7SAl Viro umode_t mode, const struct gfs2_inum_host *inum, 516160b4026SSteven Whitehouse const u64 *generation, dev_t dev, const char *symname, 517160b4026SSteven Whitehouse unsigned int size, struct buffer_head **bhp) 5182ab9cd1cSSteven Whitehouse { 5192ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5202ab9cd1cSSteven Whitehouse unsigned int uid, gid; 5212ab9cd1cSSteven Whitehouse int error; 5222ab9cd1cSSteven Whitehouse 5232ab9cd1cSSteven Whitehouse munge_mode_uid_gid(dip, &mode, &uid, &gid); 524564e12b1SBob Peterson if (!gfs2_qadata_get(dip)) 5252ab9cd1cSSteven Whitehouse return -ENOMEM; 5262ab9cd1cSSteven Whitehouse 5272ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(dip, uid, gid); 5282ab9cd1cSSteven Whitehouse if (error) 5292ab9cd1cSSteven Whitehouse goto out; 5302ab9cd1cSSteven Whitehouse 5312ab9cd1cSSteven Whitehouse error = gfs2_quota_check(dip, uid, gid); 5322ab9cd1cSSteven Whitehouse if (error) 5332ab9cd1cSSteven Whitehouse goto out_quota; 5342ab9cd1cSSteven Whitehouse 5352ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); 5362ab9cd1cSSteven Whitehouse if (error) 5372ab9cd1cSSteven Whitehouse goto out_quota; 5382ab9cd1cSSteven Whitehouse 539160b4026SSteven Whitehouse init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, symname, size, bhp); 5402ab9cd1cSSteven Whitehouse gfs2_quota_change(dip, +1, uid, gid); 5412ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5422ab9cd1cSSteven Whitehouse 5432ab9cd1cSSteven Whitehouse out_quota: 5442ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5452ab9cd1cSSteven Whitehouse out: 546564e12b1SBob Peterson gfs2_qadata_put(dip); 5472ab9cd1cSSteven Whitehouse return error; 5482ab9cd1cSSteven Whitehouse } 5492ab9cd1cSSteven Whitehouse 5502ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5512ab9cd1cSSteven Whitehouse struct gfs2_inode *ip) 5522ab9cd1cSSteven Whitehouse { 5532ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 554564e12b1SBob Peterson struct gfs2_qadata *qa; 5552ab9cd1cSSteven Whitehouse int alloc_required; 5562ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 5572ab9cd1cSSteven Whitehouse int error; 5582ab9cd1cSSteven Whitehouse 559564e12b1SBob Peterson qa = gfs2_qadata_get(dip); 560564e12b1SBob Peterson if (!qa) 5612ab9cd1cSSteven Whitehouse return -ENOMEM; 5622ab9cd1cSSteven Whitehouse 5632ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); 5642ab9cd1cSSteven Whitehouse if (error) 5652ab9cd1cSSteven Whitehouse goto fail; 5662ab9cd1cSSteven Whitehouse 5672ab9cd1cSSteven Whitehouse error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); 5682ab9cd1cSSteven Whitehouse if (alloc_required < 0) 5692ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5702ab9cd1cSSteven Whitehouse if (alloc_required) { 5712ab9cd1cSSteven Whitehouse error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); 5722ab9cd1cSSteven Whitehouse if (error) 5732ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5742ab9cd1cSSteven Whitehouse 575564e12b1SBob Peterson error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); 5762ab9cd1cSSteven Whitehouse if (error) 5772ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5782ab9cd1cSSteven Whitehouse 5792ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 58054335b1fSSteven Whitehouse dip->i_rgd->rd_length + 5812ab9cd1cSSteven Whitehouse 2 * RES_DINODE + 5822ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA, 0); 5832ab9cd1cSSteven Whitehouse if (error) 5842ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5852ab9cd1cSSteven Whitehouse } else { 5862ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5872ab9cd1cSSteven Whitehouse if (error) 5882ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5892ab9cd1cSSteven Whitehouse } 5902ab9cd1cSSteven Whitehouse 5912ab9cd1cSSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip); 5922ab9cd1cSSteven Whitehouse if (error) 5932ab9cd1cSSteven Whitehouse goto fail_end_trans; 5942ab9cd1cSSteven Whitehouse 5952ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 5962ab9cd1cSSteven Whitehouse if (error) 5972ab9cd1cSSteven Whitehouse goto fail_end_trans; 59866ad863bSSteven Whitehouse set_nlink(&ip->i_inode, S_ISDIR(ip->i_inode.i_mode) ? 2 : 1); 5992ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, dibh, 1); 6002ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 6012ab9cd1cSSteven Whitehouse brelse(dibh); 6022ab9cd1cSSteven Whitehouse return 0; 6032ab9cd1cSSteven Whitehouse 6042ab9cd1cSSteven Whitehouse fail_end_trans: 6052ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 6062ab9cd1cSSteven Whitehouse 6072ab9cd1cSSteven Whitehouse fail_ipreserv: 6082ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 6092ab9cd1cSSteven Whitehouse 6102ab9cd1cSSteven Whitehouse fail_quota_locks: 6112ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 6122ab9cd1cSSteven Whitehouse 6132ab9cd1cSSteven Whitehouse fail: 614564e12b1SBob Peterson gfs2_qadata_put(dip); 6152ab9cd1cSSteven Whitehouse return error; 6162ab9cd1cSSteven Whitehouse } 6172ab9cd1cSSteven Whitehouse 61846cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 6199d8f13baSMimi Zohar void *fs_info) 6202ab9cd1cSSteven Whitehouse { 6219d8f13baSMimi Zohar const struct xattr *xattr; 6229d8f13baSMimi Zohar int err = 0; 6232ab9cd1cSSteven Whitehouse 6249d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 6259d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 6269d8f13baSMimi Zohar xattr->value_len, 0, 6279d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 6289d8f13baSMimi Zohar if (err < 0) 6299d8f13baSMimi Zohar break; 6309d8f13baSMimi Zohar } 6312ab9cd1cSSteven Whitehouse return err; 6322ab9cd1cSSteven Whitehouse } 6332ab9cd1cSSteven Whitehouse 6349d8f13baSMimi Zohar static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, 6359d8f13baSMimi Zohar const struct qstr *qstr) 6369d8f13baSMimi Zohar { 6379d8f13baSMimi Zohar return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, 6389d8f13baSMimi Zohar &gfs2_initxattrs, NULL); 6392ab9cd1cSSteven Whitehouse } 6402ab9cd1cSSteven Whitehouse 6412ab9cd1cSSteven Whitehouse /** 642f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 643f2741d98SSteven Whitehouse * @dir: The parent directory 644f2741d98SSteven Whitehouse * @dentry: The new dentry 645f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 646f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 647f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 648f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 6492ab9cd1cSSteven Whitehouse * 650f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 6512ab9cd1cSSteven Whitehouse */ 6522ab9cd1cSSteven Whitehouse 653f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 654175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 6559a63edd1SSteven Whitehouse unsigned int size, int excl) 6562ab9cd1cSSteven Whitehouse { 657f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 658f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 6592ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 660f2741d98SSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 6612ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 6622ab9cd1cSSteven Whitehouse struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; 6632ab9cd1cSSteven Whitehouse int error; 6642ab9cd1cSSteven Whitehouse u64 generation; 6652ab9cd1cSSteven Whitehouse struct buffer_head *bh = NULL; 6662ab9cd1cSSteven Whitehouse 6672ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 668f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6692ab9cd1cSSteven Whitehouse 6700a305e49SBob Peterson error = gfs2_rs_alloc(dip); 6710a305e49SBob Peterson if (error) 6720a305e49SBob Peterson return error; 6730a305e49SBob Peterson 674f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 6752ab9cd1cSSteven Whitehouse if (error) 6762ab9cd1cSSteven Whitehouse goto fail; 6772ab9cd1cSSteven Whitehouse 6782ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6799a63edd1SSteven Whitehouse if ((error == -EEXIST) && S_ISREG(mode) && !excl) { 6809a63edd1SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 6819a63edd1SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 6829a63edd1SSteven Whitehouse d_instantiate(dentry, inode); 6839a63edd1SSteven Whitehouse return IS_ERR(inode) ? PTR_ERR(inode) : 0; 6849a63edd1SSteven Whitehouse } 6852ab9cd1cSSteven Whitehouse if (error) 6862ab9cd1cSSteven Whitehouse goto fail_gunlock; 6872ab9cd1cSSteven Whitehouse 6882ab9cd1cSSteven Whitehouse error = alloc_dinode(dip, &inum.no_addr, &generation); 6892ab9cd1cSSteven Whitehouse if (error) 6902ab9cd1cSSteven Whitehouse goto fail_gunlock; 6912ab9cd1cSSteven Whitehouse inum.no_formal_ino = generation; 6922ab9cd1cSSteven Whitehouse 6932ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, 6942ab9cd1cSSteven Whitehouse LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 6952ab9cd1cSSteven Whitehouse if (error) 6962ab9cd1cSSteven Whitehouse goto fail_gunlock; 6972ab9cd1cSSteven Whitehouse 698160b4026SSteven Whitehouse error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh); 6992ab9cd1cSSteven Whitehouse if (error) 7002ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7012ab9cd1cSSteven Whitehouse 7022ab9cd1cSSteven Whitehouse inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr, 7032ab9cd1cSSteven Whitehouse inum.no_formal_ino, 0); 7042ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 7052ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7062ab9cd1cSSteven Whitehouse 7072ab9cd1cSSteven Whitehouse error = gfs2_inode_refresh(GFS2_I(inode)); 7082ab9cd1cSSteven Whitehouse if (error) 7092ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7102ab9cd1cSSteven Whitehouse 7110a305e49SBob Peterson /* the new inode needs a reservation so it can allocate xattrs. */ 7120a305e49SBob Peterson error = gfs2_rs_alloc(GFS2_I(inode)); 7130a305e49SBob Peterson if (error) 7140a305e49SBob Peterson goto fail_gunlock2; 7150a305e49SBob Peterson 7162ab9cd1cSSteven Whitehouse error = gfs2_acl_create(dip, inode); 7172ab9cd1cSSteven Whitehouse if (error) 7182ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7192ab9cd1cSSteven Whitehouse 7202ab9cd1cSSteven Whitehouse error = gfs2_security_init(dip, GFS2_I(inode), name); 7212ab9cd1cSSteven Whitehouse if (error) 7222ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7232ab9cd1cSSteven Whitehouse 7242ab9cd1cSSteven Whitehouse error = link_dinode(dip, name, GFS2_I(inode)); 7252ab9cd1cSSteven Whitehouse if (error) 7262ab9cd1cSSteven Whitehouse goto fail_gunlock2; 7272ab9cd1cSSteven Whitehouse 7282ab9cd1cSSteven Whitehouse if (bh) 7292ab9cd1cSSteven Whitehouse brelse(bh); 730f2741d98SSteven Whitehouse 731f2741d98SSteven Whitehouse gfs2_trans_end(sdp); 732564e12b1SBob Peterson /* Check if we reserved space in the rgrp. Function link_dinode may 733564e12b1SBob Peterson not, depending on whether alloc is required. */ 7340a305e49SBob Peterson if (gfs2_mb_reserved(dip)) 735f2741d98SSteven Whitehouse gfs2_inplace_release(dip); 736f2741d98SSteven Whitehouse gfs2_quota_unlock(dip); 737564e12b1SBob Peterson gfs2_qadata_put(dip); 738f2741d98SSteven Whitehouse mark_inode_dirty(inode); 739ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit_m(2, ghs); 740f2741d98SSteven Whitehouse d_instantiate(dentry, inode); 741f2741d98SSteven Whitehouse return 0; 7422ab9cd1cSSteven Whitehouse 7432ab9cd1cSSteven Whitehouse fail_gunlock2: 7442ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 7452ab9cd1cSSteven Whitehouse fail_gunlock: 746f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 74740ac218fSSteven Whitehouse if (inode && !IS_ERR(inode)) { 74840ac218fSSteven Whitehouse set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags); 74940ac218fSSteven Whitehouse iput(inode); 75040ac218fSSteven Whitehouse } 7512ab9cd1cSSteven Whitehouse fail: 7522ab9cd1cSSteven Whitehouse if (bh) 7532ab9cd1cSSteven Whitehouse brelse(bh); 754f2741d98SSteven Whitehouse return error; 7552ab9cd1cSSteven Whitehouse } 756f2741d98SSteven Whitehouse 7572ab9cd1cSSteven Whitehouse /** 7582ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 7592ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 7602ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 7612ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 7622ab9cd1cSSteven Whitehouse * 7632ab9cd1cSSteven Whitehouse * Returns: errno 7642ab9cd1cSSteven Whitehouse */ 7652ab9cd1cSSteven Whitehouse 7662ab9cd1cSSteven Whitehouse static int gfs2_create(struct inode *dir, struct dentry *dentry, 7674acdaf27SAl Viro umode_t mode, struct nameidata *nd) 7682ab9cd1cSSteven Whitehouse { 7699a63edd1SSteven Whitehouse int excl = 0; 7709a63edd1SSteven Whitehouse if (nd && (nd->flags & LOOKUP_EXCL)) 7719a63edd1SSteven Whitehouse excl = 1; 7729a63edd1SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl); 7732ab9cd1cSSteven Whitehouse } 7742ab9cd1cSSteven Whitehouse 7752ab9cd1cSSteven Whitehouse /** 7762ab9cd1cSSteven Whitehouse * gfs2_lookup - Look up a filename in a directory and return its inode 7772ab9cd1cSSteven Whitehouse * @dir: The directory inode 7782ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 7792ab9cd1cSSteven Whitehouse * @nd: passed from Linux VFS, ignored by us 7802ab9cd1cSSteven Whitehouse * 7812ab9cd1cSSteven Whitehouse * Called by the VFS layer. Lock dir and call gfs2_lookupi() 7822ab9cd1cSSteven Whitehouse * 7832ab9cd1cSSteven Whitehouse * Returns: errno 7842ab9cd1cSSteven Whitehouse */ 7852ab9cd1cSSteven Whitehouse 7862ab9cd1cSSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 7872ab9cd1cSSteven Whitehouse struct nameidata *nd) 7882ab9cd1cSSteven Whitehouse { 7896c673ab3SAl Viro struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0); 7906c673ab3SAl Viro if (inode && !IS_ERR(inode)) { 7912ab9cd1cSSteven Whitehouse struct gfs2_glock *gl = GFS2_I(inode)->i_gl; 7922ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 7932ab9cd1cSSteven Whitehouse int error; 7942ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 7952ab9cd1cSSteven Whitehouse if (error) { 7962ab9cd1cSSteven Whitehouse iput(inode); 7972ab9cd1cSSteven Whitehouse return ERR_PTR(error); 7982ab9cd1cSSteven Whitehouse } 7992ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 8002ab9cd1cSSteven Whitehouse } 8016c673ab3SAl Viro return d_splice_alias(inode, dentry); 8022ab9cd1cSSteven Whitehouse } 8032ab9cd1cSSteven Whitehouse 8042ab9cd1cSSteven Whitehouse /** 8052ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 8062ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 8072ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 8082ab9cd1cSSteven Whitehouse * @dentry: The name of the link 8092ab9cd1cSSteven Whitehouse * 8102ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 8112ab9cd1cSSteven Whitehouse * name in "dentry". 8122ab9cd1cSSteven Whitehouse * 8132ab9cd1cSSteven Whitehouse * Returns: errno 8142ab9cd1cSSteven Whitehouse */ 8152ab9cd1cSSteven Whitehouse 8162ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 8172ab9cd1cSSteven Whitehouse struct dentry *dentry) 8182ab9cd1cSSteven Whitehouse { 8192ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 8202ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 8212ab9cd1cSSteven Whitehouse struct inode *inode = old_dentry->d_inode; 8222ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 8232ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 8242ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 8252ab9cd1cSSteven Whitehouse int alloc_required; 8262ab9cd1cSSteven Whitehouse int error; 8272ab9cd1cSSteven Whitehouse 8282ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 8292ab9cd1cSSteven Whitehouse return -EPERM; 8302ab9cd1cSSteven Whitehouse 8310a305e49SBob Peterson error = gfs2_rs_alloc(dip); 8320a305e49SBob Peterson if (error) 8330a305e49SBob Peterson return error; 8340a305e49SBob Peterson 8352ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 8362ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 8372ab9cd1cSSteven Whitehouse 8382ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 8392ab9cd1cSSteven Whitehouse if (error) 8402ab9cd1cSSteven Whitehouse goto out_parent; 8412ab9cd1cSSteven Whitehouse 8422ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 8432ab9cd1cSSteven Whitehouse if (error) 8442ab9cd1cSSteven Whitehouse goto out_child; 8452ab9cd1cSSteven Whitehouse 8462ab9cd1cSSteven Whitehouse error = -ENOENT; 8472ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 8482ab9cd1cSSteven Whitehouse goto out_gunlock; 8492ab9cd1cSSteven Whitehouse 85010556cb2SAl Viro error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); 8512ab9cd1cSSteven Whitehouse if (error) 8522ab9cd1cSSteven Whitehouse goto out_gunlock; 8532ab9cd1cSSteven Whitehouse 8542ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 8552ab9cd1cSSteven Whitehouse switch (error) { 8562ab9cd1cSSteven Whitehouse case -ENOENT: 8572ab9cd1cSSteven Whitehouse break; 8582ab9cd1cSSteven Whitehouse case 0: 8592ab9cd1cSSteven Whitehouse error = -EEXIST; 8602ab9cd1cSSteven Whitehouse default: 8612ab9cd1cSSteven Whitehouse goto out_gunlock; 8622ab9cd1cSSteven Whitehouse } 8632ab9cd1cSSteven Whitehouse 8642ab9cd1cSSteven Whitehouse error = -EINVAL; 8652ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 8662ab9cd1cSSteven Whitehouse goto out_gunlock; 8672ab9cd1cSSteven Whitehouse error = -EFBIG; 8682ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 8692ab9cd1cSSteven Whitehouse goto out_gunlock; 8702ab9cd1cSSteven Whitehouse error = -EPERM; 8712ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 8722ab9cd1cSSteven Whitehouse goto out_gunlock; 8732ab9cd1cSSteven Whitehouse error = -EINVAL; 8742ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 8752ab9cd1cSSteven Whitehouse goto out_gunlock; 8762ab9cd1cSSteven Whitehouse error = -EMLINK; 8772ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 8782ab9cd1cSSteven Whitehouse goto out_gunlock; 8792ab9cd1cSSteven Whitehouse 8802ab9cd1cSSteven Whitehouse alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); 8812ab9cd1cSSteven Whitehouse if (error < 0) 8822ab9cd1cSSteven Whitehouse goto out_gunlock; 8832ab9cd1cSSteven Whitehouse error = 0; 8842ab9cd1cSSteven Whitehouse 8852ab9cd1cSSteven Whitehouse if (alloc_required) { 886564e12b1SBob Peterson struct gfs2_qadata *qa = gfs2_qadata_get(dip); 887564e12b1SBob Peterson 888564e12b1SBob Peterson if (!qa) { 8892ab9cd1cSSteven Whitehouse error = -ENOMEM; 8902ab9cd1cSSteven Whitehouse goto out_gunlock; 8912ab9cd1cSSteven Whitehouse } 8922ab9cd1cSSteven Whitehouse 8932ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(dip); 8942ab9cd1cSSteven Whitehouse if (error) 8952ab9cd1cSSteven Whitehouse goto out_alloc; 8962ab9cd1cSSteven Whitehouse 897564e12b1SBob Peterson error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); 8982ab9cd1cSSteven Whitehouse if (error) 8992ab9cd1cSSteven Whitehouse goto out_gunlock_q; 9002ab9cd1cSSteven Whitehouse 9012ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 90254335b1fSSteven Whitehouse gfs2_rg_blocks(dip) + 9032ab9cd1cSSteven Whitehouse 2 * RES_DINODE + RES_STATFS + 9042ab9cd1cSSteven Whitehouse RES_QUOTA, 0); 9052ab9cd1cSSteven Whitehouse if (error) 9062ab9cd1cSSteven Whitehouse goto out_ipres; 9072ab9cd1cSSteven Whitehouse } else { 9082ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 9092ab9cd1cSSteven Whitehouse if (error) 9102ab9cd1cSSteven Whitehouse goto out_ipres; 9112ab9cd1cSSteven Whitehouse } 9122ab9cd1cSSteven Whitehouse 9132ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 9142ab9cd1cSSteven Whitehouse if (error) 9152ab9cd1cSSteven Whitehouse goto out_end_trans; 9162ab9cd1cSSteven Whitehouse 9172ab9cd1cSSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip); 9182ab9cd1cSSteven Whitehouse if (error) 9192ab9cd1cSSteven Whitehouse goto out_brelse; 9202ab9cd1cSSteven Whitehouse 9212ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, dibh, 1); 9222ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 9232ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 924ab9bbda0SSteven Whitehouse ihold(inode); 925ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 926ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 9272ab9cd1cSSteven Whitehouse 9282ab9cd1cSSteven Whitehouse out_brelse: 9292ab9cd1cSSteven Whitehouse brelse(dibh); 9302ab9cd1cSSteven Whitehouse out_end_trans: 9312ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 9322ab9cd1cSSteven Whitehouse out_ipres: 9332ab9cd1cSSteven Whitehouse if (alloc_required) 9342ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 9352ab9cd1cSSteven Whitehouse out_gunlock_q: 9362ab9cd1cSSteven Whitehouse if (alloc_required) 9372ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 9382ab9cd1cSSteven Whitehouse out_alloc: 9392ab9cd1cSSteven Whitehouse if (alloc_required) 940564e12b1SBob Peterson gfs2_qadata_put(dip); 9412ab9cd1cSSteven Whitehouse out_gunlock: 9422ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 9432ab9cd1cSSteven Whitehouse out_child: 9442ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 9452ab9cd1cSSteven Whitehouse out_parent: 9462ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 9472ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 9482ab9cd1cSSteven Whitehouse return error; 9492ab9cd1cSSteven Whitehouse } 9502ab9cd1cSSteven Whitehouse 9512ab9cd1cSSteven Whitehouse /* 9522ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 9532ab9cd1cSSteven Whitehouse * @dip: the directory 9542ab9cd1cSSteven Whitehouse * @name: the name of the file 9552ab9cd1cSSteven Whitehouse * @ip: the inode 9562ab9cd1cSSteven Whitehouse * 9572ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 9582ab9cd1cSSteven Whitehouse * 9592ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 9602ab9cd1cSSteven Whitehouse */ 9612ab9cd1cSSteven Whitehouse 9622ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 9632ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 9642ab9cd1cSSteven Whitehouse { 9652ab9cd1cSSteven Whitehouse int error; 9662ab9cd1cSSteven Whitehouse 9672ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 9682ab9cd1cSSteven Whitehouse return -EPERM; 9692ab9cd1cSSteven Whitehouse 9702ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 9712ab9cd1cSSteven Whitehouse dip->i_inode.i_uid != current_fsuid() && 9722ab9cd1cSSteven Whitehouse ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) 9732ab9cd1cSSteven Whitehouse return -EPERM; 9742ab9cd1cSSteven Whitehouse 9752ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 9762ab9cd1cSSteven Whitehouse return -EPERM; 9772ab9cd1cSSteven Whitehouse 97810556cb2SAl Viro error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); 9792ab9cd1cSSteven Whitehouse if (error) 9802ab9cd1cSSteven Whitehouse return error; 9812ab9cd1cSSteven Whitehouse 9822ab9cd1cSSteven Whitehouse error = gfs2_dir_check(&dip->i_inode, name, ip); 9832ab9cd1cSSteven Whitehouse if (error) 9842ab9cd1cSSteven Whitehouse return error; 9852ab9cd1cSSteven Whitehouse 9862ab9cd1cSSteven Whitehouse return 0; 9872ab9cd1cSSteven Whitehouse } 9882ab9cd1cSSteven Whitehouse 9892ab9cd1cSSteven Whitehouse /** 9902ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 9912ab9cd1cSSteven Whitehouse * @dip: The parent directory 9922ab9cd1cSSteven Whitehouse * @name: The name of the entry in the parent directory 9932ab9cd1cSSteven Whitehouse * @bh: The inode buffer for the inode to be removed 9942ab9cd1cSSteven Whitehouse * @inode: The inode to be removed 9952ab9cd1cSSteven Whitehouse * 9962ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 9972ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 9982ab9cd1cSSteven Whitehouse * 9992ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10002ab9cd1cSSteven Whitehouse */ 10012ab9cd1cSSteven Whitehouse 10022ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 10032ab9cd1cSSteven Whitehouse const struct dentry *dentry, 10042ab9cd1cSSteven Whitehouse struct buffer_head *bh) 10052ab9cd1cSSteven Whitehouse { 10062ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 10072ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10082ab9cd1cSSteven Whitehouse int error; 10092ab9cd1cSSteven Whitehouse 10102ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 10112ab9cd1cSSteven Whitehouse if (error) 10122ab9cd1cSSteven Whitehouse return error; 10132ab9cd1cSSteven Whitehouse 10142ab9cd1cSSteven Whitehouse ip->i_entries = 0; 10152ab9cd1cSSteven Whitehouse inode->i_ctime = CURRENT_TIME; 10162ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 10172ab9cd1cSSteven Whitehouse clear_nlink(inode); 10182ab9cd1cSSteven Whitehouse else 10192ab9cd1cSSteven Whitehouse drop_nlink(inode); 10202ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 10212ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 10222ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 10232ab9cd1cSSteven Whitehouse return 0; 10242ab9cd1cSSteven Whitehouse } 10252ab9cd1cSSteven Whitehouse 10262ab9cd1cSSteven Whitehouse 10272ab9cd1cSSteven Whitehouse /** 10282ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 10292ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 10302ab9cd1cSSteven Whitehouse * @dentry: The file itself 10312ab9cd1cSSteven Whitehouse * 10322ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 10332ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 10342ab9cd1cSSteven Whitehouse * 10352ab9cd1cSSteven Whitehouse * Returns: errno 10362ab9cd1cSSteven Whitehouse */ 10372ab9cd1cSSteven Whitehouse 10382ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 10392ab9cd1cSSteven Whitehouse { 10402ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 10412ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 10422ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 10432ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10442ab9cd1cSSteven Whitehouse struct buffer_head *bh; 10452ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 10462ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 10475e2f7d61SBob Peterson int error; 10485e2f7d61SBob Peterson 10495e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 10505e2f7d61SBob Peterson if (error) 10515e2f7d61SBob Peterson return error; 10525e2f7d61SBob Peterson 10535e2f7d61SBob Peterson error = -EROFS; 10542ab9cd1cSSteven Whitehouse 10552ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 10562ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 10572ab9cd1cSSteven Whitehouse 105866fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1059a365fbf3SSteven Whitehouse if (!rgd) 106087654896SSteven Whitehouse goto out_inodes; 1061a365fbf3SSteven Whitehouse 10622ab9cd1cSSteven Whitehouse gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); 10632ab9cd1cSSteven Whitehouse 10642ab9cd1cSSteven Whitehouse 10652ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 10662ab9cd1cSSteven Whitehouse if (error) 10672ab9cd1cSSteven Whitehouse goto out_parent; 10682ab9cd1cSSteven Whitehouse 10692ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 10702ab9cd1cSSteven Whitehouse if (error) 10712ab9cd1cSSteven Whitehouse goto out_child; 10722ab9cd1cSSteven Whitehouse 10732ab9cd1cSSteven Whitehouse error = -ENOENT; 10742ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 10752ab9cd1cSSteven Whitehouse goto out_rgrp; 10762ab9cd1cSSteven Whitehouse 10772ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 10782ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 10792ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 10802ab9cd1cSSteven Whitehouse goto out_rgrp; 10812ab9cd1cSSteven Whitehouse } 10822ab9cd1cSSteven Whitehouse 10832ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 10842ab9cd1cSSteven Whitehouse if (error) 10852ab9cd1cSSteven Whitehouse goto out_rgrp; 10862ab9cd1cSSteven Whitehouse 10872ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 10882ab9cd1cSSteven Whitehouse if (error) 10892ab9cd1cSSteven Whitehouse goto out_gunlock; 10902ab9cd1cSSteven Whitehouse 10912ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 10922ab9cd1cSSteven Whitehouse if (error) 10932ab9cd1cSSteven Whitehouse goto out_gunlock; 10942ab9cd1cSSteven Whitehouse 10952ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &bh); 10962ab9cd1cSSteven Whitehouse if (error) 10972ab9cd1cSSteven Whitehouse goto out_end_trans; 10982ab9cd1cSSteven Whitehouse 10992ab9cd1cSSteven Whitehouse error = gfs2_unlink_inode(dip, dentry, bh); 11002ab9cd1cSSteven Whitehouse brelse(bh); 11012ab9cd1cSSteven Whitehouse 11022ab9cd1cSSteven Whitehouse out_end_trans: 11032ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11042ab9cd1cSSteven Whitehouse out_gunlock: 11052ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11062ab9cd1cSSteven Whitehouse out_rgrp: 11072ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11082ab9cd1cSSteven Whitehouse out_child: 11092ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 11102ab9cd1cSSteven Whitehouse out_parent: 111187654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 111287654896SSteven Whitehouse out_inodes: 111387654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 11142ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 11152ab9cd1cSSteven Whitehouse return error; 11162ab9cd1cSSteven Whitehouse } 11172ab9cd1cSSteven Whitehouse 11182ab9cd1cSSteven Whitehouse /** 11192ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 11202ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 11212ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 11222ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 11232ab9cd1cSSteven Whitehouse * 11242ab9cd1cSSteven Whitehouse * Returns: errno 11252ab9cd1cSSteven Whitehouse */ 11262ab9cd1cSSteven Whitehouse 11272ab9cd1cSSteven Whitehouse static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 11282ab9cd1cSSteven Whitehouse const char *symname) 11292ab9cd1cSSteven Whitehouse { 11302ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 1131160b4026SSteven Whitehouse unsigned int size; 11322ab9cd1cSSteven Whitehouse 11332ab9cd1cSSteven Whitehouse size = strlen(symname); 11342ab9cd1cSSteven Whitehouse if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) 11352ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 11362ab9cd1cSSteven Whitehouse 11379a63edd1SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 11382ab9cd1cSSteven Whitehouse } 11392ab9cd1cSSteven Whitehouse 11402ab9cd1cSSteven Whitehouse /** 11412ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 11422ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 11432ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 11442ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 11452ab9cd1cSSteven Whitehouse * 11462ab9cd1cSSteven Whitehouse * Returns: errno 11472ab9cd1cSSteven Whitehouse */ 11482ab9cd1cSSteven Whitehouse 114918bb1db3SAl Viro static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 11502ab9cd1cSSteven Whitehouse { 11519a63edd1SSteven Whitehouse return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, 0, 0); 11522ab9cd1cSSteven Whitehouse } 11532ab9cd1cSSteven Whitehouse 11542ab9cd1cSSteven Whitehouse /** 11552ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 11562ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 11572ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 11582ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1159f2741d98SSteven Whitehouse * @dev: The device specification of the special file 11602ab9cd1cSSteven Whitehouse * 11612ab9cd1cSSteven Whitehouse */ 11622ab9cd1cSSteven Whitehouse 11631a67aafbSAl Viro static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, 11642ab9cd1cSSteven Whitehouse dev_t dev) 11652ab9cd1cSSteven Whitehouse { 11669a63edd1SSteven Whitehouse return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0, 0); 11672ab9cd1cSSteven Whitehouse } 11682ab9cd1cSSteven Whitehouse 11692ab9cd1cSSteven Whitehouse /* 11702ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 11712ab9cd1cSSteven Whitehouse * @this: move this 11722ab9cd1cSSteven Whitehouse * @to: to here 11732ab9cd1cSSteven Whitehouse * 11742ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 11752ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 11762ab9cd1cSSteven Whitehouse * 11772ab9cd1cSSteven Whitehouse * Returns: errno 11782ab9cd1cSSteven Whitehouse */ 11792ab9cd1cSSteven Whitehouse 11802ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 11812ab9cd1cSSteven Whitehouse { 11822ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 11832ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 11842ab9cd1cSSteven Whitehouse struct inode *tmp; 11852ab9cd1cSSteven Whitehouse int error = 0; 11862ab9cd1cSSteven Whitehouse 11872ab9cd1cSSteven Whitehouse igrab(dir); 11882ab9cd1cSSteven Whitehouse 11892ab9cd1cSSteven Whitehouse for (;;) { 11902ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 11912ab9cd1cSSteven Whitehouse error = -EINVAL; 11922ab9cd1cSSteven Whitehouse break; 11932ab9cd1cSSteven Whitehouse } 11942ab9cd1cSSteven Whitehouse if (dir == sb->s_root->d_inode) { 11952ab9cd1cSSteven Whitehouse error = 0; 11962ab9cd1cSSteven Whitehouse break; 11972ab9cd1cSSteven Whitehouse } 11982ab9cd1cSSteven Whitehouse 11992ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 12002ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 12012ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 12022ab9cd1cSSteven Whitehouse break; 12032ab9cd1cSSteven Whitehouse } 12042ab9cd1cSSteven Whitehouse 12052ab9cd1cSSteven Whitehouse iput(dir); 12062ab9cd1cSSteven Whitehouse dir = tmp; 12072ab9cd1cSSteven Whitehouse } 12082ab9cd1cSSteven Whitehouse 12092ab9cd1cSSteven Whitehouse iput(dir); 12102ab9cd1cSSteven Whitehouse 12112ab9cd1cSSteven Whitehouse return error; 12122ab9cd1cSSteven Whitehouse } 12132ab9cd1cSSteven Whitehouse 12142ab9cd1cSSteven Whitehouse /** 12152ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 12162ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 12172ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 12182ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 12192ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 12202ab9cd1cSSteven Whitehouse * 12212ab9cd1cSSteven Whitehouse * Returns: errno 12222ab9cd1cSSteven Whitehouse */ 12232ab9cd1cSSteven Whitehouse 12242ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 12252ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 12262ab9cd1cSSteven Whitehouse { 12272ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 12282ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 12292ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(odentry->d_inode); 12302ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 12312ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 12328339ee54SSteven Whitehouse struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; 12332ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 12342ab9cd1cSSteven Whitehouse unsigned int num_gh; 12352ab9cd1cSSteven Whitehouse int dir_rename = 0; 12362ab9cd1cSSteven Whitehouse int alloc_required = 0; 12372ab9cd1cSSteven Whitehouse unsigned int x; 12382ab9cd1cSSteven Whitehouse int error; 12392ab9cd1cSSteven Whitehouse 12402ab9cd1cSSteven Whitehouse if (ndentry->d_inode) { 12412ab9cd1cSSteven Whitehouse nip = GFS2_I(ndentry->d_inode); 12422ab9cd1cSSteven Whitehouse if (ip == nip) 12432ab9cd1cSSteven Whitehouse return 0; 12442ab9cd1cSSteven Whitehouse } 12452ab9cd1cSSteven Whitehouse 12465e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 12475e2f7d61SBob Peterson if (error) 12485e2f7d61SBob Peterson return error; 12495e2f7d61SBob Peterson 12500a305e49SBob Peterson error = gfs2_rs_alloc(ndip); 12510a305e49SBob Peterson if (error) 12520a305e49SBob Peterson return error; 12530a305e49SBob Peterson 12542ab9cd1cSSteven Whitehouse if (odip != ndip) { 12552ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 12562ab9cd1cSSteven Whitehouse 0, &r_gh); 12572ab9cd1cSSteven Whitehouse if (error) 12582ab9cd1cSSteven Whitehouse goto out; 12592ab9cd1cSSteven Whitehouse 12602ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 12612ab9cd1cSSteven Whitehouse dir_rename = 1; 12622ab9cd1cSSteven Whitehouse /* don't move a dirctory into it's subdir */ 12632ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 12642ab9cd1cSSteven Whitehouse if (error) 12652ab9cd1cSSteven Whitehouse goto out_gunlock_r; 12662ab9cd1cSSteven Whitehouse } 12672ab9cd1cSSteven Whitehouse } 12682ab9cd1cSSteven Whitehouse 12692ab9cd1cSSteven Whitehouse num_gh = 1; 12702ab9cd1cSSteven Whitehouse gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 12712ab9cd1cSSteven Whitehouse if (odip != ndip) { 12722ab9cd1cSSteven Whitehouse gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12732ab9cd1cSSteven Whitehouse num_gh++; 12742ab9cd1cSSteven Whitehouse } 12752ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12762ab9cd1cSSteven Whitehouse num_gh++; 12772ab9cd1cSSteven Whitehouse 12782ab9cd1cSSteven Whitehouse if (nip) { 12792ab9cd1cSSteven Whitehouse gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); 12802ab9cd1cSSteven Whitehouse num_gh++; 12812ab9cd1cSSteven Whitehouse /* grab the resource lock for unlink flag twiddling 12822ab9cd1cSSteven Whitehouse * this is the case of the target file already existing 12832ab9cd1cSSteven Whitehouse * so we unlink before doing the rename 12842ab9cd1cSSteven Whitehouse */ 128566fc061bSSteven Whitehouse nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 12862ab9cd1cSSteven Whitehouse if (nrgd) 12872ab9cd1cSSteven Whitehouse gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); 12882ab9cd1cSSteven Whitehouse } 12892ab9cd1cSSteven Whitehouse 12902ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 12912ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 12922ab9cd1cSSteven Whitehouse if (error) 12932ab9cd1cSSteven Whitehouse goto out_gunlock; 12942ab9cd1cSSteven Whitehouse } 12952ab9cd1cSSteven Whitehouse 12962ab9cd1cSSteven Whitehouse error = -ENOENT; 12972ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 12982ab9cd1cSSteven Whitehouse goto out_gunlock; 12992ab9cd1cSSteven Whitehouse 13002ab9cd1cSSteven Whitehouse /* Check out the old directory */ 13012ab9cd1cSSteven Whitehouse 13022ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 13032ab9cd1cSSteven Whitehouse if (error) 13042ab9cd1cSSteven Whitehouse goto out_gunlock; 13052ab9cd1cSSteven Whitehouse 13062ab9cd1cSSteven Whitehouse /* Check out the new directory */ 13072ab9cd1cSSteven Whitehouse 13082ab9cd1cSSteven Whitehouse if (nip) { 13092ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 13102ab9cd1cSSteven Whitehouse if (error) 13112ab9cd1cSSteven Whitehouse goto out_gunlock; 13122ab9cd1cSSteven Whitehouse 13132ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 13142ab9cd1cSSteven Whitehouse error = -EAGAIN; 13152ab9cd1cSSteven Whitehouse goto out_gunlock; 13162ab9cd1cSSteven Whitehouse } 13172ab9cd1cSSteven Whitehouse 13182ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 13192ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 13202ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 13212ab9cd1cSSteven Whitehouse error = -EIO; 13222ab9cd1cSSteven Whitehouse goto out_gunlock; 13232ab9cd1cSSteven Whitehouse } 13242ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 13252ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 13262ab9cd1cSSteven Whitehouse goto out_gunlock; 13272ab9cd1cSSteven Whitehouse } 13282ab9cd1cSSteven Whitehouse } 13292ab9cd1cSSteven Whitehouse } else { 133010556cb2SAl Viro error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); 13312ab9cd1cSSteven Whitehouse if (error) 13322ab9cd1cSSteven Whitehouse goto out_gunlock; 13332ab9cd1cSSteven Whitehouse 13342ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 13352ab9cd1cSSteven Whitehouse switch (error) { 13362ab9cd1cSSteven Whitehouse case -ENOENT: 13372ab9cd1cSSteven Whitehouse error = 0; 13382ab9cd1cSSteven Whitehouse break; 13392ab9cd1cSSteven Whitehouse case 0: 13402ab9cd1cSSteven Whitehouse error = -EEXIST; 13412ab9cd1cSSteven Whitehouse default: 13422ab9cd1cSSteven Whitehouse goto out_gunlock; 13432ab9cd1cSSteven Whitehouse }; 13442ab9cd1cSSteven Whitehouse 13452ab9cd1cSSteven Whitehouse if (odip != ndip) { 13462ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 13472ab9cd1cSSteven Whitehouse error = -ENOENT; 13482ab9cd1cSSteven Whitehouse goto out_gunlock; 13492ab9cd1cSSteven Whitehouse } 13502ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 13512ab9cd1cSSteven Whitehouse error = -EFBIG; 13522ab9cd1cSSteven Whitehouse goto out_gunlock; 13532ab9cd1cSSteven Whitehouse } 13542ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 13552ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 13562ab9cd1cSSteven Whitehouse error = -EMLINK; 13572ab9cd1cSSteven Whitehouse goto out_gunlock; 13582ab9cd1cSSteven Whitehouse } 13592ab9cd1cSSteven Whitehouse } 13602ab9cd1cSSteven Whitehouse } 13612ab9cd1cSSteven Whitehouse 13622ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 13632ab9cd1cSSteven Whitehouse 13642ab9cd1cSSteven Whitehouse if (dir_rename) { 136510556cb2SAl Viro error = gfs2_permission(odentry->d_inode, MAY_WRITE); 13662ab9cd1cSSteven Whitehouse if (error) 13672ab9cd1cSSteven Whitehouse goto out_gunlock; 13682ab9cd1cSSteven Whitehouse } 13692ab9cd1cSSteven Whitehouse 13702ab9cd1cSSteven Whitehouse if (nip == NULL) 13712ab9cd1cSSteven Whitehouse alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); 13722ab9cd1cSSteven Whitehouse error = alloc_required; 13732ab9cd1cSSteven Whitehouse if (error < 0) 13742ab9cd1cSSteven Whitehouse goto out_gunlock; 13752ab9cd1cSSteven Whitehouse 13762ab9cd1cSSteven Whitehouse if (alloc_required) { 1377564e12b1SBob Peterson struct gfs2_qadata *qa = gfs2_qadata_get(ndip); 1378564e12b1SBob Peterson 1379564e12b1SBob Peterson if (!qa) { 13802ab9cd1cSSteven Whitehouse error = -ENOMEM; 13812ab9cd1cSSteven Whitehouse goto out_gunlock; 13822ab9cd1cSSteven Whitehouse } 13832ab9cd1cSSteven Whitehouse 13842ab9cd1cSSteven Whitehouse error = gfs2_quota_lock_check(ndip); 13852ab9cd1cSSteven Whitehouse if (error) 13862ab9cd1cSSteven Whitehouse goto out_alloc; 13872ab9cd1cSSteven Whitehouse 1388564e12b1SBob Peterson error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres); 13892ab9cd1cSSteven Whitehouse if (error) 13902ab9cd1cSSteven Whitehouse goto out_gunlock_q; 13912ab9cd1cSSteven Whitehouse 13922ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + 139354335b1fSSteven Whitehouse gfs2_rg_blocks(ndip) + 13942ab9cd1cSSteven Whitehouse 4 * RES_DINODE + 4 * RES_LEAF + 13952ab9cd1cSSteven Whitehouse RES_STATFS + RES_QUOTA + 4, 0); 13962ab9cd1cSSteven Whitehouse if (error) 13972ab9cd1cSSteven Whitehouse goto out_ipreserv; 13982ab9cd1cSSteven Whitehouse } else { 13992ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 14002ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 14012ab9cd1cSSteven Whitehouse if (error) 14022ab9cd1cSSteven Whitehouse goto out_gunlock; 14032ab9cd1cSSteven Whitehouse } 14042ab9cd1cSSteven Whitehouse 14052ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 14062ab9cd1cSSteven Whitehouse 14072ab9cd1cSSteven Whitehouse if (nip) { 14082ab9cd1cSSteven Whitehouse struct buffer_head *bh; 14092ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(nip, &bh); 14102ab9cd1cSSteven Whitehouse if (error) 14112ab9cd1cSSteven Whitehouse goto out_end_trans; 14122ab9cd1cSSteven Whitehouse error = gfs2_unlink_inode(ndip, ndentry, bh); 14132ab9cd1cSSteven Whitehouse brelse(bh); 14142ab9cd1cSSteven Whitehouse } 14152ab9cd1cSSteven Whitehouse 14162ab9cd1cSSteven Whitehouse if (dir_rename) { 14172ab9cd1cSSteven Whitehouse error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 14182ab9cd1cSSteven Whitehouse if (error) 14192ab9cd1cSSteven Whitehouse goto out_end_trans; 14202ab9cd1cSSteven Whitehouse } else { 14212ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 14222ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 14232ab9cd1cSSteven Whitehouse if (error) 14242ab9cd1cSSteven Whitehouse goto out_end_trans; 14252ab9cd1cSSteven Whitehouse ip->i_inode.i_ctime = CURRENT_TIME; 14262ab9cd1cSSteven Whitehouse gfs2_trans_add_bh(ip->i_gl, dibh, 1); 14272ab9cd1cSSteven Whitehouse gfs2_dinode_out(ip, dibh->b_data); 14282ab9cd1cSSteven Whitehouse brelse(dibh); 14292ab9cd1cSSteven Whitehouse } 14302ab9cd1cSSteven Whitehouse 14312ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 14322ab9cd1cSSteven Whitehouse if (error) 14332ab9cd1cSSteven Whitehouse goto out_end_trans; 14342ab9cd1cSSteven Whitehouse 14352ab9cd1cSSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip); 14362ab9cd1cSSteven Whitehouse if (error) 14372ab9cd1cSSteven Whitehouse goto out_end_trans; 14382ab9cd1cSSteven Whitehouse 14392ab9cd1cSSteven Whitehouse out_end_trans: 14402ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 14412ab9cd1cSSteven Whitehouse out_ipreserv: 14422ab9cd1cSSteven Whitehouse if (alloc_required) 14432ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 14442ab9cd1cSSteven Whitehouse out_gunlock_q: 14452ab9cd1cSSteven Whitehouse if (alloc_required) 14462ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 14472ab9cd1cSSteven Whitehouse out_alloc: 14482ab9cd1cSSteven Whitehouse if (alloc_required) 1449564e12b1SBob Peterson gfs2_qadata_put(ndip); 14502ab9cd1cSSteven Whitehouse out_gunlock: 14512ab9cd1cSSteven Whitehouse while (x--) { 14522ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 14532ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 14542ab9cd1cSSteven Whitehouse } 14552ab9cd1cSSteven Whitehouse out_gunlock_r: 14562ab9cd1cSSteven Whitehouse if (r_gh.gh_gl) 14572ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 14582ab9cd1cSSteven Whitehouse out: 14592ab9cd1cSSteven Whitehouse return error; 14602ab9cd1cSSteven Whitehouse } 14612ab9cd1cSSteven Whitehouse 14622ab9cd1cSSteven Whitehouse /** 14632ab9cd1cSSteven Whitehouse * gfs2_follow_link - Follow a symbolic link 14642ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 14652ab9cd1cSSteven Whitehouse * @nd: Data that we pass to vfs_follow_link() 14662ab9cd1cSSteven Whitehouse * 14672ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 14682ab9cd1cSSteven Whitehouse * 14692ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 14702ab9cd1cSSteven Whitehouse */ 14712ab9cd1cSSteven Whitehouse 14722ab9cd1cSSteven Whitehouse static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) 14732ab9cd1cSSteven Whitehouse { 14742ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(dentry->d_inode); 14752ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 14762ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1477160b4026SSteven Whitehouse unsigned int size; 14782ab9cd1cSSteven Whitehouse char *buf; 14792ab9cd1cSSteven Whitehouse int error; 14802ab9cd1cSSteven Whitehouse 14812ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 14822ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 14832ab9cd1cSSteven Whitehouse if (error) { 14842ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 14852ab9cd1cSSteven Whitehouse nd_set_link(nd, ERR_PTR(error)); 14862ab9cd1cSSteven Whitehouse return NULL; 14872ab9cd1cSSteven Whitehouse } 14882ab9cd1cSSteven Whitehouse 14892ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 14902ab9cd1cSSteven Whitehouse if (size == 0) { 14912ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 14922ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 14932ab9cd1cSSteven Whitehouse goto out; 14942ab9cd1cSSteven Whitehouse } 14952ab9cd1cSSteven Whitehouse 14962ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 14972ab9cd1cSSteven Whitehouse if (error) { 14982ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 14992ab9cd1cSSteven Whitehouse goto out; 15002ab9cd1cSSteven Whitehouse } 15012ab9cd1cSSteven Whitehouse 1502160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 15032ab9cd1cSSteven Whitehouse if (!buf) 15042ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 15052ab9cd1cSSteven Whitehouse else 1506160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 15072ab9cd1cSSteven Whitehouse brelse(dibh); 15082ab9cd1cSSteven Whitehouse out: 15092ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 15102ab9cd1cSSteven Whitehouse nd_set_link(nd, buf); 15112ab9cd1cSSteven Whitehouse return NULL; 15122ab9cd1cSSteven Whitehouse } 15132ab9cd1cSSteven Whitehouse 15142ab9cd1cSSteven Whitehouse static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) 15152ab9cd1cSSteven Whitehouse { 15162ab9cd1cSSteven Whitehouse char *s = nd_get_link(nd); 15172ab9cd1cSSteven Whitehouse if (!IS_ERR(s)) 15182ab9cd1cSSteven Whitehouse kfree(s); 15192ab9cd1cSSteven Whitehouse } 15202ab9cd1cSSteven Whitehouse 15212ab9cd1cSSteven Whitehouse /** 15222ab9cd1cSSteven Whitehouse * gfs2_permission - 15232ab9cd1cSSteven Whitehouse * @inode: The inode 15242ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 15252ab9cd1cSSteven Whitehouse * @flags: Indicates whether this is an RCU path walk or not 15262ab9cd1cSSteven Whitehouse * 15272ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 15282ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 15292ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 15302ab9cd1cSSteven Whitehouse * 15312ab9cd1cSSteven Whitehouse * Returns: errno 15322ab9cd1cSSteven Whitehouse */ 15332ab9cd1cSSteven Whitehouse 153410556cb2SAl Viro int gfs2_permission(struct inode *inode, int mask) 15352ab9cd1cSSteven Whitehouse { 15362ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 15372ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 15382ab9cd1cSSteven Whitehouse int error; 15392ab9cd1cSSteven Whitehouse int unlock = 0; 15402ab9cd1cSSteven Whitehouse 15412ab9cd1cSSteven Whitehouse 15422ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 15432ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 154410556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 15452ab9cd1cSSteven Whitehouse return -ECHILD; 15462ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 15472ab9cd1cSSteven Whitehouse if (error) 15482ab9cd1cSSteven Whitehouse return error; 15492ab9cd1cSSteven Whitehouse unlock = 1; 15502ab9cd1cSSteven Whitehouse } 15512ab9cd1cSSteven Whitehouse 15522ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 15532ab9cd1cSSteven Whitehouse error = -EACCES; 15542ab9cd1cSSteven Whitehouse else 15552830ba7fSAl Viro error = generic_permission(inode, mask); 15562ab9cd1cSSteven Whitehouse if (unlock) 15572ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 15582ab9cd1cSSteven Whitehouse 15592ab9cd1cSSteven Whitehouse return error; 15602ab9cd1cSSteven Whitehouse } 15612ab9cd1cSSteven Whitehouse 1562ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 15632ab9cd1cSSteven Whitehouse { 15642ab9cd1cSSteven Whitehouse setattr_copy(inode, attr); 15652ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 15662ab9cd1cSSteven Whitehouse return 0; 15672ab9cd1cSSteven Whitehouse } 15682ab9cd1cSSteven Whitehouse 15692ab9cd1cSSteven Whitehouse /** 15702ab9cd1cSSteven Whitehouse * gfs2_setattr_simple - 15712ab9cd1cSSteven Whitehouse * @ip: 15722ab9cd1cSSteven Whitehouse * @attr: 15732ab9cd1cSSteven Whitehouse * 15742ab9cd1cSSteven Whitehouse * Returns: errno 15752ab9cd1cSSteven Whitehouse */ 15762ab9cd1cSSteven Whitehouse 1577ab9bbda0SSteven Whitehouse int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 15782ab9cd1cSSteven Whitehouse { 15792ab9cd1cSSteven Whitehouse int error; 15802ab9cd1cSSteven Whitehouse 15812ab9cd1cSSteven Whitehouse if (current->journal_info) 1582ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 15832ab9cd1cSSteven Whitehouse 1584ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 15852ab9cd1cSSteven Whitehouse if (error) 15862ab9cd1cSSteven Whitehouse return error; 15872ab9cd1cSSteven Whitehouse 1588ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1589ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 15902ab9cd1cSSteven Whitehouse return error; 15912ab9cd1cSSteven Whitehouse } 15922ab9cd1cSSteven Whitehouse 15932ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 15942ab9cd1cSSteven Whitehouse { 15952ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 15962ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 15972ab9cd1cSSteven Whitehouse u32 ouid, ogid, nuid, ngid; 15982ab9cd1cSSteven Whitehouse int error; 15992ab9cd1cSSteven Whitehouse 16002ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 16012ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 16022ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 16032ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 16042ab9cd1cSSteven Whitehouse 16052ab9cd1cSSteven Whitehouse if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) 16062ab9cd1cSSteven Whitehouse ouid = nuid = NO_QUOTA_CHANGE; 16072ab9cd1cSSteven Whitehouse if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) 16082ab9cd1cSSteven Whitehouse ogid = ngid = NO_QUOTA_CHANGE; 16092ab9cd1cSSteven Whitehouse 1610564e12b1SBob Peterson if (!gfs2_qadata_get(ip)) 16112ab9cd1cSSteven Whitehouse return -ENOMEM; 16122ab9cd1cSSteven Whitehouse 16132ab9cd1cSSteven Whitehouse error = gfs2_quota_lock(ip, nuid, ngid); 16142ab9cd1cSSteven Whitehouse if (error) 16152ab9cd1cSSteven Whitehouse goto out_alloc; 16162ab9cd1cSSteven Whitehouse 16172ab9cd1cSSteven Whitehouse if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { 16182ab9cd1cSSteven Whitehouse error = gfs2_quota_check(ip, nuid, ngid); 16192ab9cd1cSSteven Whitehouse if (error) 16202ab9cd1cSSteven Whitehouse goto out_gunlock_q; 16212ab9cd1cSSteven Whitehouse } 16222ab9cd1cSSteven Whitehouse 16232ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 16242ab9cd1cSSteven Whitehouse if (error) 16252ab9cd1cSSteven Whitehouse goto out_gunlock_q; 16262ab9cd1cSSteven Whitehouse 1627ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 16282ab9cd1cSSteven Whitehouse if (error) 16292ab9cd1cSSteven Whitehouse goto out_end_trans; 16302ab9cd1cSSteven Whitehouse 16312ab9cd1cSSteven Whitehouse if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { 16322ab9cd1cSSteven Whitehouse u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); 16332ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, -blocks, ouid, ogid); 16342ab9cd1cSSteven Whitehouse gfs2_quota_change(ip, blocks, nuid, ngid); 16352ab9cd1cSSteven Whitehouse } 16362ab9cd1cSSteven Whitehouse 16372ab9cd1cSSteven Whitehouse out_end_trans: 16382ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 16392ab9cd1cSSteven Whitehouse out_gunlock_q: 16402ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 16412ab9cd1cSSteven Whitehouse out_alloc: 1642564e12b1SBob Peterson gfs2_qadata_put(ip); 16432ab9cd1cSSteven Whitehouse return error; 16442ab9cd1cSSteven Whitehouse } 16452ab9cd1cSSteven Whitehouse 16462ab9cd1cSSteven Whitehouse /** 16472ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 16482ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 16492ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 16502ab9cd1cSSteven Whitehouse * 16512ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 16522ab9cd1cSSteven Whitehouse * that change out to disk. 16532ab9cd1cSSteven Whitehouse * 16542ab9cd1cSSteven Whitehouse * Returns: errno 16552ab9cd1cSSteven Whitehouse */ 16562ab9cd1cSSteven Whitehouse 16572ab9cd1cSSteven Whitehouse static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) 16582ab9cd1cSSteven Whitehouse { 16592ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 16602ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 16612ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 16622ab9cd1cSSteven Whitehouse int error; 16632ab9cd1cSSteven Whitehouse 16640a305e49SBob Peterson error = gfs2_rs_alloc(ip); 16650a305e49SBob Peterson if (error) 16660a305e49SBob Peterson return error; 16670a305e49SBob Peterson 16682ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 16692ab9cd1cSSteven Whitehouse if (error) 16702ab9cd1cSSteven Whitehouse return error; 16712ab9cd1cSSteven Whitehouse 16722ab9cd1cSSteven Whitehouse error = -EPERM; 16732ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 16742ab9cd1cSSteven Whitehouse goto out; 16752ab9cd1cSSteven Whitehouse 16762ab9cd1cSSteven Whitehouse error = inode_change_ok(inode, attr); 16772ab9cd1cSSteven Whitehouse if (error) 16782ab9cd1cSSteven Whitehouse goto out; 16792ab9cd1cSSteven Whitehouse 16802ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 16812ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 16822ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 16832ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 16842ab9cd1cSSteven Whitehouse else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) 16852ab9cd1cSSteven Whitehouse error = gfs2_acl_chmod(ip, attr); 16862ab9cd1cSSteven Whitehouse else 1687ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 16882ab9cd1cSSteven Whitehouse 16892ab9cd1cSSteven Whitehouse out: 16902ab9cd1cSSteven Whitehouse if (!error) 16912ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 1692ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 16932ab9cd1cSSteven Whitehouse return error; 16942ab9cd1cSSteven Whitehouse } 16952ab9cd1cSSteven Whitehouse 16962ab9cd1cSSteven Whitehouse /** 16972ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 16982ab9cd1cSSteven Whitehouse * @mnt: The vfsmount the inode is being accessed from 16992ab9cd1cSSteven Whitehouse * @dentry: The dentry to stat 17002ab9cd1cSSteven Whitehouse * @stat: The inode's stats 17012ab9cd1cSSteven Whitehouse * 17022ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 17032ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 17042ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 17052ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 17062ab9cd1cSSteven Whitehouse * with the glock already held. 17072ab9cd1cSSteven Whitehouse * 17082ab9cd1cSSteven Whitehouse * Returns: errno 17092ab9cd1cSSteven Whitehouse */ 17102ab9cd1cSSteven Whitehouse 17112ab9cd1cSSteven Whitehouse static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, 17122ab9cd1cSSteven Whitehouse struct kstat *stat) 17132ab9cd1cSSteven Whitehouse { 17142ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17152ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17162ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17172ab9cd1cSSteven Whitehouse int error; 17182ab9cd1cSSteven Whitehouse int unlock = 0; 17192ab9cd1cSSteven Whitehouse 17202ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 17212ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 17222ab9cd1cSSteven Whitehouse if (error) 17232ab9cd1cSSteven Whitehouse return error; 17242ab9cd1cSSteven Whitehouse unlock = 1; 17252ab9cd1cSSteven Whitehouse } 17262ab9cd1cSSteven Whitehouse 17272ab9cd1cSSteven Whitehouse generic_fillattr(inode, stat); 17282ab9cd1cSSteven Whitehouse if (unlock) 17292ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 17302ab9cd1cSSteven Whitehouse 17312ab9cd1cSSteven Whitehouse return 0; 17322ab9cd1cSSteven Whitehouse } 17332ab9cd1cSSteven Whitehouse 17342ab9cd1cSSteven Whitehouse static int gfs2_setxattr(struct dentry *dentry, const char *name, 17352ab9cd1cSSteven Whitehouse const void *data, size_t size, int flags) 17362ab9cd1cSSteven Whitehouse { 17372ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17382ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17392ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17402ab9cd1cSSteven Whitehouse int ret; 17412ab9cd1cSSteven Whitehouse 17422ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 17432ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17442ab9cd1cSSteven Whitehouse if (ret == 0) { 17452ab9cd1cSSteven Whitehouse ret = generic_setxattr(dentry, name, data, size, flags); 17462ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17472ab9cd1cSSteven Whitehouse } 17482ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17492ab9cd1cSSteven Whitehouse return ret; 17502ab9cd1cSSteven Whitehouse } 17512ab9cd1cSSteven Whitehouse 17522ab9cd1cSSteven Whitehouse static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, 17532ab9cd1cSSteven Whitehouse void *data, size_t size) 17542ab9cd1cSSteven Whitehouse { 17552ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17562ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17572ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17582ab9cd1cSSteven Whitehouse int ret; 17592ab9cd1cSSteven Whitehouse 17602ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 17612ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17622ab9cd1cSSteven Whitehouse if (ret == 0) { 17632ab9cd1cSSteven Whitehouse ret = generic_getxattr(dentry, name, data, size); 17642ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17652ab9cd1cSSteven Whitehouse } 17662ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17672ab9cd1cSSteven Whitehouse return ret; 17682ab9cd1cSSteven Whitehouse } 17692ab9cd1cSSteven Whitehouse 17702ab9cd1cSSteven Whitehouse static int gfs2_removexattr(struct dentry *dentry, const char *name) 17712ab9cd1cSSteven Whitehouse { 17722ab9cd1cSSteven Whitehouse struct inode *inode = dentry->d_inode; 17732ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17742ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17752ab9cd1cSSteven Whitehouse int ret; 17762ab9cd1cSSteven Whitehouse 17772ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); 17782ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq(&gh); 17792ab9cd1cSSteven Whitehouse if (ret == 0) { 17802ab9cd1cSSteven Whitehouse ret = generic_removexattr(dentry, name); 17812ab9cd1cSSteven Whitehouse gfs2_glock_dq(&gh); 17822ab9cd1cSSteven Whitehouse } 17832ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&gh); 17842ab9cd1cSSteven Whitehouse return ret; 17852ab9cd1cSSteven Whitehouse } 17862ab9cd1cSSteven Whitehouse 17872ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 17882ab9cd1cSSteven Whitehouse u64 start, u64 len) 17892ab9cd1cSSteven Whitehouse { 17902ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 17912ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 17922ab9cd1cSSteven Whitehouse int ret; 17932ab9cd1cSSteven Whitehouse 17942ab9cd1cSSteven Whitehouse ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); 17952ab9cd1cSSteven Whitehouse if (ret) 17962ab9cd1cSSteven Whitehouse return ret; 17972ab9cd1cSSteven Whitehouse 17982ab9cd1cSSteven Whitehouse mutex_lock(&inode->i_mutex); 17992ab9cd1cSSteven Whitehouse 18002ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 18012ab9cd1cSSteven Whitehouse if (ret) 18022ab9cd1cSSteven Whitehouse goto out; 18032ab9cd1cSSteven Whitehouse 18042ab9cd1cSSteven Whitehouse if (gfs2_is_stuffed(ip)) { 18052ab9cd1cSSteven Whitehouse u64 phys = ip->i_no_addr << inode->i_blkbits; 18062ab9cd1cSSteven Whitehouse u64 size = i_size_read(inode); 18072ab9cd1cSSteven Whitehouse u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| 18082ab9cd1cSSteven Whitehouse FIEMAP_EXTENT_DATA_INLINE; 18092ab9cd1cSSteven Whitehouse phys += sizeof(struct gfs2_dinode); 18102ab9cd1cSSteven Whitehouse phys += start; 18112ab9cd1cSSteven Whitehouse if (start + len > size) 18122ab9cd1cSSteven Whitehouse len = size - start; 18132ab9cd1cSSteven Whitehouse if (start < size) 18142ab9cd1cSSteven Whitehouse ret = fiemap_fill_next_extent(fieinfo, start, phys, 18152ab9cd1cSSteven Whitehouse len, flags); 18162ab9cd1cSSteven Whitehouse if (ret == 1) 18172ab9cd1cSSteven Whitehouse ret = 0; 18182ab9cd1cSSteven Whitehouse } else { 18192ab9cd1cSSteven Whitehouse ret = __generic_block_fiemap(inode, fieinfo, start, len, 18202ab9cd1cSSteven Whitehouse gfs2_block_map); 18212ab9cd1cSSteven Whitehouse } 18222ab9cd1cSSteven Whitehouse 18232ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 18242ab9cd1cSSteven Whitehouse out: 18252ab9cd1cSSteven Whitehouse mutex_unlock(&inode->i_mutex); 18262ab9cd1cSSteven Whitehouse return ret; 18272ab9cd1cSSteven Whitehouse } 18282ab9cd1cSSteven Whitehouse 18292ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_file_iops = { 18302ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18312ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18322ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18332ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18342ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18352ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18362ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18372ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18384e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18392ab9cd1cSSteven Whitehouse }; 18402ab9cd1cSSteven Whitehouse 18412ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_dir_iops = { 18422ab9cd1cSSteven Whitehouse .create = gfs2_create, 18432ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 18442ab9cd1cSSteven Whitehouse .link = gfs2_link, 18452ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 18462ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 18472ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 18482ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 18492ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 18502ab9cd1cSSteven Whitehouse .rename = gfs2_rename, 18512ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18522ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18532ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18542ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18552ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18562ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18572ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18582ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18594e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18602ab9cd1cSSteven Whitehouse }; 18612ab9cd1cSSteven Whitehouse 18622ab9cd1cSSteven Whitehouse const struct inode_operations gfs2_symlink_iops = { 18632ab9cd1cSSteven Whitehouse .readlink = generic_readlink, 18642ab9cd1cSSteven Whitehouse .follow_link = gfs2_follow_link, 18652ab9cd1cSSteven Whitehouse .put_link = gfs2_put_link, 18662ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 18672ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 18682ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 18692ab9cd1cSSteven Whitehouse .setxattr = gfs2_setxattr, 18702ab9cd1cSSteven Whitehouse .getxattr = gfs2_getxattr, 18712ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 18722ab9cd1cSSteven Whitehouse .removexattr = gfs2_removexattr, 18732ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 18744e34e719SChristoph Hellwig .get_acl = gfs2_get_acl, 18752ab9cd1cSSteven Whitehouse }; 18762ab9cd1cSSteven Whitehouse 1877